Pleaseee help ASAP
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Pleaseee Help ASAPwill Mark Brainliest!!! &lt;3

Answers

Answer 1
The answer is A because Fluorine has 7 atoms in its valence shell.
Answer 2

Answer:

Fluorine belongs to the group 7 A so it must have 7 electrons in the oribits so the answer would be A as u count the electrons in the orbits, There are exactly 7 electron

Explanation:


Related Questions

What is a hypothesis?
O proof and evidence of a scientific fact
O a question about nature and how it works
a series of steps to carry out an experiment
O a possible explanation of or answer to a scientific question

Answers

Answer:

The 4th option

a possible explanation of or answer to a scientific question

Explanation:

Answer:

A hypothesis is a question about naturre and how it works

put 34,100,000 in scientific notation

Answers

Answer:

3.41 x 10^7

Explanation:

235/92 U + 1/0 n -> 138/55 Cs + 96/37 Rb + 2 1/0 n
what kind of reaction?

Answers

Answer:

Nuclear fission

Explanation:

This reaction is called a nuclear fission reaction. In this reaction, a radioactive decay process occurs in which a heavy nucleus spontaneously disintegrates into two lighter nuclei and several neutrons, with the release of a large amount of energy.

The imbalance between the number of neutrons and protons is responsible for this spontaneous disintegration. Until a stable daughter cell forms, the reaction proceeds.

What measuring tool is used to find the volume of a shoe box?
A.water displacement
B.scale
C.beaker
D.ruler

Answers

Answer:

D. Ruler

Explanation:

Use the formula to find the volume of a cuboid by measuring the length, width, and height and multiplying all of them by each other.

Reducing child __________, or rate of death, is one of the primary goals of the UN’s Millennium Development Goals.
A.
mortality
B.
maternity
C.
infirmity
D.
infection

Answers

Answer: A

Explanation: Mortality means death. And it is a primary goal of Development Goals

Reducing child mortality, or rate of death, is one of the primary goals of the UN’s Millennium Development Goals and the correct option is option A.

What is Mortality?

Mortality is defined as the state of the individual being dead. The mortality rate is the death rate of a population which is calculated on the basis of the deaths in the particular region.

Mortality as one of the components of demography is measured as mortality rate.

Mortality meaning provides the basis for mortality rate and its estimation. Mortality is the possibility of and susceptibility to death, and hence, the rate of mortality or the death rate is the measurement of the number of deaths that occur in a particular population, scaled to the size of that population per unit of time.

Therefore, Reducing child mortality, or rate of death, is one of the primary goals of the UN’s Millennium Development Goals and the correct option is option A.

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Complete a write up about the elements in Ammonia and explain how the elements bounded to create the new substance.

Answers

Answer:

Explanation:

Ammonia consist of nitrogen and hydrogen.

Chemical equation:

N₂ + H₂    →   NH₃

Balance chemical  equation:

N₂ + 3H₂    →   2NH₃

We can see that nitrogen and hydrogen react with each other and from ammonia.

Nitrogen is present in group 5A.  The atomic number of nitrogen is 7.  Its atomic mass is 14 amu.  It has 5 valence electron.

Electronic configuration:

N₇ = 1s² 2s² 2p³

we can see there are five electron in outer most shell. Thus, nitrogen needs three more electrons to complete the octet.  When it combine with other atoms it gain three electron from them

While hydrogen is present in group 1A. It has one valence electron. In ammonia (NH₃) when nitrogen react with hydrogen it gain three electrons thus three atoms of hydrogen combine with one atom of ammonia because one hydrogen atom can share only one electron. Covalent bond is formed between nitrogen and hydrogen and new substance formed is called ammonia.

Do you believe that in 2020 every single American, regardless of race, sex, or income level, has an equal opportunity to achieve his/her American Dream? Why or why not?

Answers

Answer:

Tbh i rlly dont think that many will.  Most may succeed  in doing so. But i mean come on its 2020 anything can happen.

Explanation:

Answer:

yes 100% what reasons r there to not tho

Explanation:


Which type of matter is always made up of only one kind of atom?
A. Element
B. Mixture
C. Molecule
D. Compound
pls answer fast

Answers

Answer:

A. element

Explanation:

Answer: Element

Explanation: A substance that is composed of only one type of atom is called an element. At this point, what should amaze you is that all forms of matter in our universe are made with only 118 different building blocks.

Each of the atoms in alkali earths metal Family( group 2) has ___ valence Electrons .

Pleasee help I’ll mark you as brainlister
Fill in the blank

Answers

Answer:

the answer is 2 valence electrons

mortal kombat 11 or the new cyber punk which do u think is better

Answers

Answer:

personally I like the mortal kombat 11 better

Answer:

mortal combat 11.

19. Chemical properties can be used to
(1) differentiate between two compounds
(2) determine the temperature of a substance
(3) determine the density of a substance
(4) differentiate between two neutrons

Answers

Answer:differentiate between two compounds i think!

Explanation: taking a test!

Answer:(1) differentiate between two compounds

Explanation:

A Chemical property tells us the  characteristics of a particular matter or substance after a  chemical change. This property helps us to differentiate a compound from another or differentiate   elements or substances. Examples of a Chemical property are  acidity, reactivity and heat, etc .

For example to differentiate between Water H2O and  Hydrogen peroxide, H202

Even though they are made up of  oxygen and hydrogen. Hydrogen peroxide  (H2O2), has  more(1) oxygen than water (H2O).

Using Acidity as a chemical property to differentiate these substances

Water, H20  is amphoteric in nature ie having both acidic and basic properties, while H202 is a weak acid.

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Can you tell me the Valence Electron of each element?​

Answers

Answer:

Lithium oxide.......................

Explanation:

6. magnicium chloride

2.Barium chloride

3. calcium nitride

4. lithium oxide

5. Aluminium sulphide

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Which of the following is the abbreviation for the element Gold?

Answers

the abbreviation is Au

Answer:

Au

Explanation:

trust me, the abbrevation for gold is Au. chemicaly, Medicaly, and in dentistry

what are the spectrum lines, and they're color emmited and nanometers

Answers

Emission lines are seen as coloured lines on a black background. Absorption lines are seen as black lines on a coloured background. The presence of spectral lines is explained by quantum mechanics in terms of the energy levels of atoms, ions and molecules.

i hope it is helpful:) mark as brainlist

A student determines the density of an element to be 2.73 g/cm 3 . If the accepted value is 2.70 grams per cm 3 , what is the student's percent error? Identify the element. What is the boiling of this element in Celsius degree

Answers

Answer:

Explanation:

percentage error = error  x 100 / correct value

= (2.73 - 2.70) x100 / 2.70

= 1.11 %

The element is Aluminium whose density is 2.702 grams / cc

Boiling point of Aluminium = 2519⁰C .

How many particles in 32.0 liters of helium

Answers

Number of particles : 8.603 x 10²³

Further explanation

Standard conditions for temperature and pressure are used as a reference in certain calculations or conditions

Assumption⇒ Standard Conditions

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters/mol.

1 mol = 6.02 x 10²³ particles (atoms, ions, or molecules)

32.0 liters of Helium

[tex]\tt mol=32:22.4=1.429[/tex]

Number of particles :

[tex]\tt 1.429\times 6.02\times 10^{23}\\\\=8.603\times 10^{23}[/tex]

Examine the layers of rock. Identify and explain which layer contains the youngest fossils.

Earth layers with fossiles in each labeled top to bottom A to D.

Answers

Answer:

Layer A is the youngest

Explanation:

It is at the top, it has all of the dinosaur bones which got buried after earth got hit with an asteroid and they went extinct. Layer D started it and all of these years dirt, soil, and fossils have been gathering making each layer before older and older.  

Which of the following is the end product of a natural
radioactive series?

Answers

Answer:

Lead

Explanation:

Lead (Pb) is the end product of every natural radioactive series.

2.18 x 10^6 ng = 2.18 x 10^? mg

Answers

Answer:

2.18 * 10^12 mg

Explanation:

1 nanogram [ng] = 10^6 milligram [mg]

2.18 * 10^6 ng/ 1 ng = X mg / 10^6 mg

X mg = 2.18 * 10^12 mg

Answer:

2.18 * 10^12 mg

Explanation

Which chemical equation best represents the Law of Conservation of
Mass?
O H+ 0 -> H20
H2 + 02 --> H20
2H2 + O2 --> 2H20
H2 + O2 --> 2H,02

Answers

2H₂ + O₂ ⇒ 2H₂O

Further explanation

Conservation of mass states that

In a closed system, the masses before and after the reaction are the same

So it can be concluded

mass of the reactants = mass of the productsmass cannot be created or destroyedThe number of atoms involved in a reaction remains the same⇒ number of moles also the samechemical equation in balanced form

So let's see which of the several options , which one has the same number of atoms on both sides of the equation

2H₂ + O₂ ⇒ 2H₂O

H ⇒ left 4, right 4

O ⇒ left 2, right 2

so the equation is in balance and represents the Law of Conservation of

Mass

if an object has a mass of 30 grams and a volume of 6 cubic cm. what is its density

Answers

Answer:

5

Explanation:

mass/volume = density

30/5 = 5

Are the oldest rocks in the canyon found near the bottom

Answers

Answer: yes they are

Explanation:

because its so hot and the heat just stays at the bottom

I beg you please please I beg you help me please I’m litterly crying please :(

Answers

Nitrogen is the answer

Convert the following to Celsius
6) 32°F
7) 45°F
8) 70°F
9) 80° F
10) 90° F
11) 212°F

Answers

9. (80-32)5/9

48×5/9

240/9

26.66°C

9. (90-32)5/9

58×5/9

32.22°C

10 (212-32)5/9

180×5/9

20×5

100°C

please help asappp
will mark branliest!!

Answers

Answer:c

Explanation:

Answer:

C is the answer

are in the outermost energy level

i need help and it’s for science cause i have a bad grade in it and have 3 days to get all my grades up so help pls?

Answers

Pretty sure it’s the last one

You are a high school track & field coach and you have a young female athlete who is running a competitive mile pace (5:20). This would make her competitive at the state and national level. You want to help this athlete to maintain and even increase her competitive potential. What would you do?

Answers

Answer:

By ensuring she is giving speed endurance training

Explanation:

Speed endurance training would be the most ideal in helping an athlete to maintain and even increase her competitive potential.

The speed endurance training would help the athlete maintain and attain a high speed for a longer duration of time.

This would make the athlete get used to running an improved time for much longer distances.

how many atoms is in a molecule of omega 3 fatty acid

Answers

Answer:

There are 18 carbon atoms in a molecule of omega 3 fatty acid

Explanation:

This answer to this is 18


Is hydrogen a metal or a nonmetal? How many valence electrons does a hydrogen atom have?

Answers

Answer:

hydrogen is a non-metal, and has one valence electron.

Explanation:

Hope this helps!!

Hydrogen shows properties of both metals and nonmetals. However, hydrogen is placed with the alkali metals since it contains one valence electrons.

What is hydrogen ?

Hydrogen is the first element in the periodic table. It has only one electron and it is the valence electron of hydrogen. Therefore, hydrogen is placed in the first group of periodic table.

Hydrogen needs one more electrons to become stable. The 17th group elements halogens also have a valency of  one. Hence, hydrogen shows some chemical similarities with halogens also.

Mostly hydrogen forms covalent bonds like non-metals and in rare cases, hydrogen forms ionic bonds by donating its electron. Therefore, hydrogen is mostly considered as a non-metal.

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How
myny moles are present in 5.6x1022 atoms of Ne? (0.09 moles Ne)
Sot ne10.05

Answers

Answer:

mole = no of atoms/ 6.02E23.... so therefore answer= 5.6E22/6.02E23= 0.093✨

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