Answer: cations together in a sea of electrons
Explanation:
Metallic bonding is the type of chemical bonding occurs between the atoms of a metals. In this type of bonding arises due to electrostatic interaction between the electron cloud of de-localized electrons with positively charges metal ions called as cations.
These de-localized electrons are the valence electrons of metal atoms which are shared between them.
In ionic bonding , the cations are attracted to anions where cations are formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Who re-introduces Democritus' theory of atoms back into modern science in the 1800's?
Answer:
John Dalton with his atomic theory reintrodcued the theroy of atoms
Explanation:
Around 450 B.C., the Greek philosopher Democritus introduced the idea of the atom. However, the idea was essentially forgotten for more than 2000 years. In 1800, John Dalton re-introduced the atom. He provided evidence for atoms and developed atomic theory
Explanation:
8. What is an energy level?
A)The region outside the nucleus where the neutron is likely to be moving.
B)The region outside the nucleus where the electron is likely to be moving.
C)The region outside the nucleus where the proton is likely to be moving.
D)The region inside the nucleus where the electrons are located.
Answer:
B. The region outside a nucleus where the electron is moving
Explanation:
The more the electron moves, the higher energy level it has, the slower the electron moves the lowwer energy level it has.
Answer:
Energy levels (also called electron shells) are fixed distances from the nucleus of an atom where electrons may be found. Electrons are tiny, negatively charged particles in an atom that move around the positive nucleus at the center. Energy levels are a little like the steps of a staircase. You can stand on one step or another but not in between the steps. The same goes for electrons. They can occupy one energy level or another but not the space between energy levels.
:D
What makes the atomic radius change down a column of the periodic table?
O A. The greater number of total electrons, the larger the atomic radius.
O B. The more valence electrons listed, the larger the atomic radius.
C. The more sublevels occupied, the larger the atomic radius.
O D. The larger the highest energy level number, the larger the atomic
radius.
Answer:
As you go across a period, radius shrinks because you are adding protons. The added positive charge increases pull on the electron shells. So I believe the answer is D
The statement, that describes the atomic radius change down a column of the periodic table is "the larger the highest energy level number, the larger the atomic radius."
What is atomic radius?The size of an atom is described by its atomic radius. Atomic radius is commonly defined as the total distance from an atom's nucleus to the electron's outermost orbital.
The atomic radii of elements steadily grow from top to bottom in a group. As we move down the group, the atomic number rises, and so does the number of shells. Furthermore, as we advance down the group, the valence electrons are present in a higher shell, increasing the distance of the valence electrons from the nucleus. As a result, the attraction between the nucleus and the valence electron weakens. When a result, as one moves along a group, the atomic radius grows.
As the number of energy levels (n) decreases down a group, the distance between the nucleus and the outermost orbital rises. As a result, the atomic radius increases.
Hence, the correct option is D.
Learn more about atomic radius here
https://brainly.in/question/250766
#SPJ3
What does it mean for heat to be transferred by convection?
O A. Energy is transferred through moving currents of warmer air or
liquid.
O B. Energy is transferred through converting bond energy to kinetic
energy
C. Energy is transferred when molecules absorb electromagnetic
wees
O D. Energy is transferred when one molecule collides with another
Answer:
A
Explanation:
It seems most appropriate since it's the transfer of heat in fluids including air
Heat is meant to be transferred by convection as energy is transferred through moving currents of warmer air or liquid which is in option a as it involves the transfer of thermal energy through the movement of a fluid.
In convection process, the warmer regions of the fluid or liquid become less dense, which is causing them to rise. As the warmer fluid rises, it carries thermal energy with it as its properties change. while, the cooler regions of the fluid became denser, and that led to sink. This creates a continuous circulation of the fluid, which helps to distribute the heat in the area.
Learn more about convection here.
https://brainly.com/question/4138428
#SPJ7
Energy is involved in some way in all chemical reactions. Which type of reaction involves the absorption of energy from the surroundings? Options: exothermic reactions endothermic reactions
Answer:
endothermic reaction
Explantion:
The definition for endothermic is:
describing a process that involves the absorption of energy from the surroundings by substances undergoing change.
Think of en-dothermic as energy entering and ex-othermic as energy exiting.
Answer:
Endothermic
Explanation:
On Edge :)
Which of the following would have the best thermal conductor properties?
A. A thick mug
B. A plastic cup
Ос. A paper cup
D. A cup made of metal
Answer:
D
Explanation:
metal is a major cunductor of heat
A cup made of metal would have the best thermal conductor properties.
The answer is option D.
Is a metal cup a good conductor of heat?Metals have unfastened electrons that are not bounded to the atoms. those electrons are unfastened to move around within the metal, colliding with the metal atoms and shifting heat to them successfully. This makes metals higher conductors of warmth than maximum other materials.
Which of the following would have a high-quality thermal conductor?Diamond is the leading thermally conductive material and has conductivity values measured 5x better than copper, the maximum synthetic metallic inside the united states of America. Diamond atoms are composed of a simple carbon spine this is a really perfect molecular structure for an effective heat switch.
Learn more about thermal conductors here: https://brainly.com/question/18507496
#SPJ2
What type of bond is formed between hydrogen and nitrogen in ammonia (NH3)? A. polar covalent B. ionic C. nonpolar covalent D. metallic
Answer:
A. Polar covalent
Explanation:
The polarity of a bond depends on the electronegativity difference (ΔEN) between the bonded atoms.
If the electronegativity difference between the atoms is between 0.4 and 1.7, the bond is polar covalent.
For an N-H bond, ΔEN = |3.04-2.20| = 0.84
So, the bond is polar covalent.
B is wrong. A bond is ionic only if ΔEN > 1.6.
C is wrong. A bond is nonpolar only if ΔEN < 0.4.
D is wrong. N and H are not metals.
Which describes a climate effect on the rate of weathering? Cold climates favor mechanical weathering. Chemical reactions occur slower at higher temperatures. Lower precipitation levels lead to more chemical reactions. The chemical reaction rates of minerals are not impacted by temperature.
Answer:
the answer is Cold climates favor mechanical weathering.
Explanation:
I got 100% on the Quiz
Statement that describes climate effect on the rate of weathering as regards this question is A:Cold climates favor mechanical weathering.
Weathering can be regarded as disaggregation of rocks into smaller bits by the actions of agents of weathering such as man, animals, water and so on.However, climate can also have effect on the rate of weathering, when there is cold climate, mechanical weathering is favoured.Option B,C,D are wrong because high temperature brings about increase in rate of chemical weathering.
Therefore, option A is correct.
Learn more at:
https://brainly.com/question/21251700?referrer=searchResults
Kool-Aid is made up of sugar (C6H12O6), food coloring, and water. It is an example of a(n)
element
heterogeneous mixture
homogeneous mixture
compound
What is a scientific method? A. A method of testing an idea B. The steps required to form a hypothesis C. A way of analyzing data D. The process of proving a theory
Answer:
A. A method of testing an idea
Explanation:
The steps of the scientific process involve formulating a hypothesis, testing it, analysing the data, making conclusions, and reporting the findings.
Atoms are very small. Approximately how many atoms would it take to
make a stack as thick as a potato chip?
A. Thousands
B. Hundreds
C. Billions
D. Millions
Reset Selection
Answer:
Billions
Explanation:
A full stop contains almost trillion of atoms.
Billions of atoms would it take to make a stack as thick as a potato chip. Hence, option C is correct.
What are atoms?An atom consists of a central nucleus that is usually surrounded by one or more electrons.
Billions of atoms would it take to make a stack as thick as a potato chip. Hence, option C is correct.
Learn more about atoms here:
https://brainly.com/question/1566330
#SPJ2
Explain how it is possible to have a homogeneous mixture of two different compounds. Give an example.
Answer:
Take a look at explanation below.
Explanation:
Part 1 ) A homogeneous mixture of two different substances, by definition, is a solution. A homogeneous mixture itself is known to have same proportions of its components throughout any given sample. Thus it is possible to have two different compounds in this mixture, but still let it distribute among themselves evenly.
_______________________________________________________
Part 2 ) How is this possible? Take the simple example of " mixing salt with water. " This is a solution. The salt ( dissolved material ) is present in the same amount throughout the solution, as it evenly distributes itself.
A homogeneous mixture is formed when;
Two liquids are completely miscibleA solid dissolved completely in a liquidA homogeneous mixture is one in which there is no phase difference. A homogeneous mixture has a continuous uniform composition throughout the system.
For instance, water and ethanol are miscible in all proportions hence a mixture of the two is an example of a homogeneous mixture.
Also, when sugar is dissolved in water, the sugar completely disappears and become a continuous phase. The resulting solution is a homogeneous mixture.
Learn more: https://brainly.com/question/11458175
A compound with a molar mass of about 28 g/mol contains 85.7% carbon and 14.3% hydrogen by mass. Write the Lewis structure for a molecule of the compound.
Answer:
See below.
Explanation:
Take a look at the attachment( s ) below. One has an explanation, the other has the lewis dot structure solution;
The compound with molar mass 28 g/mol has been ethylene, with the molecular formula [tex]\rm \bold{C_2H_4}[/tex].
The Lewis structure has been the structure of the molecule consisting of the number of bonds present in the compound. The given compound has been 100% weight/weight.
The percent of carbon = 85.7%
The percent of hydrogen = 14.3%
The compound has molecular mass = 28 g/mol
Since, the given percent of hydrogen and carbon has been weight %. The mass of hydrogen and carbon has been:
Mass of carbon = 85.7 g
Mass of hydrogen = 14.3 g
The moles of hydrogen and carbon in the compound has been:
[tex]\rm Moles\;=\;\dfrac{Mass}{Molecular\;mass}[/tex]
Moles of carbon can be given as:
[tex]\rm Moles\;of\;carbon\;=\;\dfrac{85.7\;g}{12.01\;g/mol}[/tex]
Moles of carbon = 7.13 mol
Moles of hydrogen can be given as:
[tex]\rm Moles\;of\;hydrogen\;=\;\dfrac{14.3\;g}{1.008\;g/mol}[/tex]
Moles of hydrogen = 14.19 mol
In the given molecular compound, the number of atoms of hydrogen and carbon has been calculated with respect to carbon moles, to give the empirical formula of the compound.
The atoms of carbon has been:
[tex]\rm Carbon\;=\;\dfrac{7.13}{7.13}[/tex]
Carbon = 1
The atoms of hydrogen has been:
[tex]\rm Hydrogen\;=\;\dfrac{14.19}{7.13}[/tex]
Hydrogen = 2
The empirical formula of compound has been [tex]\rm \bold{CH_2}[/tex].
The compound has molar mass 28 g/mol.
The mass of [tex]\rm \bold{CH_2}[/tex] = 14 g/mol
The number of empirical formula unit has been given as:
[tex]\rm Number\;of\;empirical\;formula\;unit\;=\;\dfrac{14}{28}[/tex]
Number of empirical formula unit = 2
Thus the molecular formula of the compound has been [tex]\rm \bold{C_2H_4}[/tex]. The attached image has been the structure of ethylene.
The compound with molar mass 28 g/mol has been ethylene, with the molecular formula [tex]\rm \bold{C_2H_4}[/tex].
For more information about the Lewis structure, refer to the link:
https://brainly.com/question/4144781
Which type of molecules is shown below? A. Lipid B. Nucleic acid C. Carbohydrate D. Amino acid
Amino acid is the type of molecule shown in the image.
What is an amino acid?Amino acids are small molecules that are the building blocks of proteins.
Amino acids are the smaller component pieces, called monomers, that are joined together to make the longer strand, or polymer, which is a protein. Amino acids are joined by covalent bonds called peptide bonds to make a polypeptide chain, which eventually creates proteins in our cells. There are 20 different amino acids in our cells that come together in a unique order to create the proteins organisms need.
Hence, an amino acid is the type of molecule shown in the image.
Learn more about amino acids here:
https://brainly.com/question/23875276
#SPJ2
which of the following accurately describes the transmission of sound and waves in seawater? A sound travels faster in seawater because seawater is less compressible than the atmosphere. B sound travels slower in seawater because seawater is less dense than the atmosphere C sound travels slower in seawater because seawater is colder than the atmosphere D sound travels faster in seawater because seawater is less dense than the atmosphere.
Answer:
Salty water is more dens than freshwater. answer is D
Explanation:
The statement which accurately describes the transmission of sound and waves in seawater that sound travels faster in seawater because seawater is more dense than the atmosphere.
What is sound waves?Sound wave is an example of longitudinal wave. It always travel through any medium as it requires some objects to transfer its energy.
Travelling of sound waves is directly depends on the vibration of the particles of the medium and in seawater particles of the water in the form of salt are present in much amount which makes it dense. And due to dense medium sound waves will travel through seawater through the fast speed.
Hence, sound travels faster in seawater because seawater is more dense than the atmosphere.
To know more about sound waves, visit the below link:
https://brainly.com/question/1199084
#SPJ2
Which of the following is a combustion reaction?
O A. CO2 + H2O + H2CO3
O B. CzHg + 502 → 3002 + 4H20
O C. MgSO4 + Ba → BaSO4 + Mg
D. NaOH + HCl → NaCl + H2O
A glass of table wine contains:
5% alcohol
7% alcohol
12% alcohol
17% alcohol
There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, a glass of table wine contains 12% alcohol in it.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.
There are so many drinks in markets which differ in the percentage of alcohol present in them. A glass of table wine contains 12% alcohol in it.
Therefore, a glass of table wine contains 12% alcohol in it.
To learn more about chemical compound, here:
brainly.com/question/26487468
#SPJ2
What is the main reason cells are replaced in the body?
A The cells are too large.
B The cells are inactive.
C The cells are damaged.
D The cells are cancerous.
Answer:
The answer is C
Explanation:
Because when cells are damaged, your body will make new cells to get rid of damaged cells and if you don't, it can become cancerous. For example, if a damaged cell isn't removed, then it might reproduce agian and then you will have sickly cells or cancerous cells.
Peas contain 250 kJ per 100 g. You would use the equivalent of 600 g of peas if you slept for .
Answer: 7,793 hours.
Explanation:
Let's assume you are about 150 pounds. You would use only 414 calories a night (1.7 kJ). If 250 kJ is 100 g, then 1500 kj is 600 g. So we would need 360000 calories to be eaten. You would have to sleep for about 7,793 hours.
What is the latent heat of vaporization?
A. The energy required to break molecular bonds
B. The energy required to go from a liquid to a gas
C. The energy required to go from a solid to a liquid
D. The energy required to go from a solid to a gas
B
The arrangement of a substance's molecules changes when it changes phases, but its temperature remains constant. The substance absorbs thermal energy from its surroundings to undergo a phase shift if the new arrangement has a larger thermal energy content. The substance releases thermal energy onto its surroundings if the new arrangement contains less thermal energy.
A substance's physical characteristic is its latent heat of vaporization. Its definition is the amount of heat needed to transform a single mole of liquid at its boiling point at mean atmospheric pressure. It is stated in terms of kg/mol or kJ/kg. The energy causes a liquid substance to transition from a liquid form to a vaporous one.
Which of the following describes scientists?
A. People with similar personalities
B. People from different backgrounds
C. People with perfect understanding of science
D. People with only one perspective
Answer:C.people with perfect understanding of science.
Answer:
C. People with perfect understanding of science
Explanation:
Similar personalities, different backgrounds, and only one perspective are just traits of people.
Perfect understanding of science is relating to a scientist. Scientists have high knowledge of science.
In the electron configuration for scandium (atomic number 21), what is the
notation for the three highest-energy electrons?
Select one:
O a. 30% 452
O b. 453
O c. 3d3
O d. 452 4p?
Answer:
Explanation:
d. 452 4p
hope it helps
Why does reducing solute particle size increase the speed at which the solute dissolves in water? A. It exposes more of the solute to the water molecules. B. It makes the temperature of the water significantly higher. C. It raises the pressure of the water molecules on the solute. D. It makes the water molecules move around faster.
Answer:
A.
Explanation:
A. It exposes more of the solute to the water molecules.
The possible products of a double displacement reaction in aqueous solution are SrSO4 and NaCl. Which of these possible products will form as a solid in this reaction? Question 8 options: A) SrSO4 B) Neither compound will form as a solid C) Both compounds will form as a solid D) NaCl
Answer:
SrSO4
Explanation:
According to solubility rules, we know that the sulphates of the elements of group two are insoluble in water. The solubility rules describe what chemical species are soluble in water and what species are not soluble in water.
Generally, all chlorides are soluble in water with exception of chlorides such as silver chloride. The chlorides of group one elements are usually highly soluble in water.
Since SrSO4 is a sulphate of a group two element (strontium) it will be the insoluble solid product of the double displacement reaction described in the question.
Answer:
SrSO4
According to solubility rules, we know that the sulphates of the elements of group two are insoluble in water. The solubility rules describe what chemical species are soluble in water and what species are not soluble in water. Generally, all chlorides are soluble in water with exception of chlorides such as silver chloride. The chlorides of group one elements are usually highly soluble in water.
Read more at Answer.Ya.Guru – https://answer.ya.guru/questions/3710374-the-possible-products-of-a-double-displacement-reaction-in.html
what mass of mass phosphoric acid will be produced if 42.0 grams of water react
Answer:
4 mol H3PO4
Explanation:
which diagram(s) represents the bonding pattern of metals? a)A and B
b)C and D
c)A
d)C
the other guy is totally wrong. the answer is a for sure. C is showing a covalent bond between 3 atoms. Metals bond differently. Like shown in a and b. However b is innacurate because it shows the electrons being the largest(since they are negatively charged and there is a - sybmol), and we all know protons are much larger than electrons. SO a is correct because it depicts the positive protons(+ symbol) as the biggest. So go with a.
Dogs can have different coloured coats, this is known v________
Answer:
Genes Rule
Explanation:
The color of a dog's coat is basically at the mercy of his gene pool. Genes do two things that determine a dog's appearance. They control the pigments produced (eumelanin and phaeomelanin) and where these pigments are produced.
Match the condensed structural diagrams with the correct names
I. CH3-CH2-COOH
II. CH3-CH2-OH
III. CH3-COO-CH2-CH3
IV. CH2OH-CH2-CH3
V. CHOO-CH3
VI. CH3-COOH
46. Ethanol
47. Propyl ethanoate
48. Propan 1-Ol
49. Propanoic acid
50. Ethanoic acid
51. Methyl methanoate
Question related to above)
For each of the waters provided, identify the alcohol and the carboxylic acid that reacted
52. Methyl propanoate (-)+ (-)
53. Ethyl methanoate(-) +(-)
Answer:
Here's what I get
Explanation:
1. Names
I. CH₃-CH₂-COOH = 49. propanoic acid
II. CH₃-CH₂-OH = 46. ethanol
III. CH₃-COO-CH₂-CH₂-CH₃ = 47. propyl ethanoate
IV. H-O-CH₂-CH₂-CH₃ = 48. propan-1-ol
V. H-COO-CH₃ = 51. methyl methanoate
VI. CH₃-COOH = 50. ethanoic acid
2. Precursors
52. methyl propionate ⇒ methanol + propanoic acid
53. ethyl methanoate ⇒ ethanol + methanoic acid
Which of the following is an accurate description of an ionic bond? Anions and anions attract. Cations and cations attract. Cations and anions attract. Atoms share electrons.
Answer:
Atoms of different elements, having gained or lost electrons, form negative and positive ions that are bonded together by attractive forces between ions with opposite charges.
Explanation:
The atoms have different numbers of neutrons and the same number of protons. hope this helps you :)
Light shining on a strip of metal can dislodge electrons. Do you think this is more consistent with light being made up of waves or of particles?
waves
particles
not sure
Answer:
The correct answer to the following question will be "Particles".
Explanation:
A particle seems to be a little component of something, it's little. When you're talking about a subatomic particle, that would be a structured user likely won't see because it's quite unbelievably thin, but it has a tiny mass as well as structural integrity. Such particles seem to be tinier than that of the particles or atoms.Such that the light which shines on the bit of metal could dissipate electrons, the particles seem to be more compatible with the light.Answer:
particles
Explanation:
on edge