20 points to whoever can answer these 3 questions correctly
Pt. 3

Answer:

ion

Explanation:

that is the definition according to g o o g l e:

"an atom or molecule with a net electric charge due to the loss or gain of one or more electrons."

Answer:

An ION

Explanation:

Because a positive ion is called a CATION and a negative ion is called an ANION (Please brainlist me)

Answer:

Contact

Explanation:

As the speed of the particles increases, they move around more, which means they hit the sides of the container more.

Answer:

What type of plant

Where is it mainly found

What are some facts about it?

Answer:

ch20 is the empirical formula for glucose , c6h1206 is the molecular formula .

Answer:

The  electronegativity   of fluorine  compare  to the  electronegativity   of oxygen and chlorine as below

Explanation:

Fluorine  has the highest electronegativity than oxygen, and  chlorine.

 Explanation

Generally  the  electronegativity  increase   across the period ( from the left to the right)  and  decreases down  the group.

Both oxygen and fluorine  are in period 2   in  periodic   table. since  fluorine is on  fur  right side as compared to oxygen , fluorine has higher  electronegativity than  oxygen.

On the  other side  Fluorine  and  chlorine are  in the same group in periodic table. fluorine  is at  the top of  the group  while chlorine  is at  the bottom therefore fluorine has  higher electronegativity  than chlorine.

Answer:

i think it's B

Explanation:

Answer:i don’t know

Explanation:i don’t know

Answer:

1. Which type of matter has the molecules packed closer together?

a. Solid

2. Matter is made up of _________.

d. All of them

3. Particles with more energy move ________ than particles with less

energy.

c. Faster and farther apart

4. Which best describes the particles in a liquid?

b. More freely moving than a solid

5. Which of the following statements describes a mass?

c. The amount of matter in an object.

Answer:

Explained below

Explanation:

Fossil fuels which are made up of coal and oil when burnt by power-production industries, make sulfur to be released into the atmosphere where it combines with oxygen to form SO2 (sulfur Dioxide). Now, the exhausts possessed by cars could also cause the formation of nitrogen oxides in the atmosphere. Therefore, H2SO4 which is airborne sulfuric acid and HNO3 which is nitric acid can be formed and when dissolved in the water vapor in the atmosphere form what is called acid rain.

Now, as acid rain flows through the soil, it can leach aluminum from the soil clay particles and then flow into the lakes to make them more acidic.

Answer:

I'm pretty sure it's the cell membrane

Answer:about 10,000 years b maybe

Explanation:Strontium-90 and cesium-137 have half-lives of about 30 years (half the radioactivity will decay in 30 years). Plutonium-239 has a half-life of 24,000 years. High-level wastes are hazardous because they produce fatal radiation doses during short periods of direct exposure.

The radioactive waste from nuclear plants is radioactive for 10,000 years and the correct option is option B.

The waste produced by a nuclear power plant or lab is referred to as radioactive waste. They include radioactive substances that are dangerous to the environment and the majority of biological forms. The wastes degrade over time.

Radioactive wastes are stored to-

Therefore, the radioactive waste from nuclear plants is radioactive for 10,000 years and the correct option is option B.

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Answer:

just use calculator mannn

Answer:

4092 atoms of iron i am guessing

Explanation:

Answer:

Explanation:

By dating the rocks in Earth's ever-changing crust, as well as the rocks in Earth's neighbors, such as the moon and visiting meteorites, scientists have calculated that Earth is 4.54 billion years old, with an error range of 50 million years

Fogging a mirror with your breath is a physical change because it involves a phase change of water vapor condensing and adsorbing to the mirror surface. Phase changes are physical changes.

Breaking a bone is a physical change insofar as we're focusing on the  "breaking" part.

Mending a broken bone, however, is a different story. Bones are living things: They consist of tissues that in turn consist of cells. The actual mending process involves some very complicated biochemistry. Suffice it to say that mending a broken bone would be a chemical change.

Burning paper is a chemical change. Burning anything implies combustion, which is a chemical reaction where some fuel is oxidized (usually by oxygen gas, producing carbon dioxide gas and water vapor).

Slicing potatoes for fries is a physical change. You can slice, dice, smash, mash, stretch, bend, compress, or grind a potato: What you will have is still a potato (okay, there are some chemical changes going on as you're rupturing cells in the process, causing them to release their contents which may participate in chemical reactions). But the key, again, is that cutting up some material doesn't fundamentally change the chemical identity of that material.

Mixing sugar with coffee actually involves two physical processes: the mixing and the (presumed) solvation of the solid sugar particles as they dissolve into the coffee. In either case, either mixing or dissolving would be a physical change. The sugar molecules are still in the coffee and are chemically unchanged.

Frying chicken is a chemical change. In fact, frying chicken likely entails several different types of chemical changes. The common thread among them is that frying involves breaking chemical bonds in and on the chicken by the addition of thermal energy, and new chemical bonds end up being formed. That's the hallmark of a chemical change.

A nail rusting is a chemical change. Rusting is an electrochemical process; the familiar corrosion of iron into rust is, at bottom, a chemical reaction where iron reacts with oxygen to form iron oxides (often catalyzed by the presence of water and salts).

A paper ripping is analogous to slicing potatoes: it's a physical change. If you ripped one sheet of paper into two halves, each half would retain all the chemical properties of the original sheet.

Likewise, wood burning is analogous to burning paper, and as such is a chemical change. Again, combustion is a chemical process.

As we said earlier with sugar in coffee, mixing in itself is a physical process. While it may seem like you've permanently changed the nature of the water by dyeing it with food coloring, the molecules comprising the food coloring are simply dispersed within the vast sea of water molecules. There are no intramolecular bonds that are broken or formed; the chemical identities of all the substances here are preserved. So, this is a physical change.

Food molding (rotting) is a chemical change. Rotting is biochemical decomposition: the chemical bonds that make up the food are broken down by enzymes released by the mold.

Writing on paper, whether it be with a pen, pencil, crayon, or marker, is a physical change. The molecules from the writing instrument are physically stuck to the paper. But unless you're writing on paper by, say, burning letters onto it, there are no chemical changes occurring when the writing instrument meets the paper.

As with writing on paper, dyeing fabric can be a physical change. The dye consists of molecules that interact with light in a way that we perceive a certain color. When dyeing fabric, these molecules are transferred and fixed into the fabric by adsorption, absorption, and other intermolecular phenomena. But the molecules of the dye (and the molecules in the fabric) don't experience any breaking and forming of bonds. All of the substances involved retain their chemical identities.

However, it's possible that, depending on the dye, there may be chemical changes involved. Some dyes, appropriate named "reactive dyes," undergo chemical reactions with their substrate (which, in this case, would be the fabric), or dyes may be used that undergo chemical reactions with one another, both of which would constitute chemical changes. And it can depend on what you mean by "dyeing": Bleaching a colored shirt can technically be conceived of as "dyeing" the shirt white, and this process involves cleavage of bonds within the color-producing molecules in the fabric by reacting with the molecules in the bleach.

So, for dyeing fabric, it can be a physical or chemical change depending on the dye.  

Answer:

d. The correct answer for your questions is Sr<Ca<Be

Answer:

Answer:- choice d is correct. Sr<Ca<Be .

Explanations:- Br, Ca, and Sr are all elements of same group as they all have 2 valence electrons. As we move down in a group, a new shell is being added that increases the size of the atom. As the size of an atom increases, it is easy to remove the electron from it's outer most shell in it's gaseous state. Since, Be is above Ca and Ca is above Sr. The size increases in the order, Be < Ca < Sr. It means Be is the smallest one of them and so it's hard to remove from it's outer most shell and hence it's ionization energy is higher.

Sr is largest one in these three elements and so it's easy to remove outer most electron from it that means the ionization energy is least. Ca is between Be and Sr.

So, an increasing order of ionization energy is Sr<Ca<Be . Choice D is correct.

Answer:

force had thrown the object with more

Answer:

If an object is in motion and more force is applied to it, the object will begin moving faster

Explanation:

don't have any (sorry:[ )

Answer:

D.) The nuclear model describes the atom as a dense, positive nucleus surrounded by a cloud of negative electrons.

Answer

The nuclear model describes the atom as a dense, positive nucleus surrounded by a cloud of negative electrons.

Answer:

For balancing this equation

we need to put

Ag2O. = 2

Ag = 4

O2 = 1

Hope it will help

The balanced chemical equation of decomposition of silver oxide is 2 Ag₂O -> 4 Ag + O₂.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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Answer:

64cm^3

Explanation:

To get the volume just multiple 4*4*4

Sulfur is not nearly as electronegative as oxygen so that hydrogen sulfide is not nearly as polar as water. Because of this, comparatively weak intermolecular forces exist for H2S and the melting and boiling points are much lower than they are in water.

The boiling point of hydrogen sulfide is low because the oxygen atom was stronger electronegative than that of the Sulphur atom, water would be more polar than hydrogen sulphide.

If a molecule does have more positive charges on one end than negative charges on the other, an electrical pole has been created. This is how polar molecules are typically formed.

What is boiling point?

The temperature where a liquid's vapor pressure reaches the pressure around it as well as the liquid transforms into a vapor is known as the boiling point of a substance.

The boiling point of hydrogen sulfide is low because the oxygen atom was stronger electronegative than that of the Sulphur atom, water would be more polar than hydrogen sulphide. Additionally, hydrogen sulphide has a lesser melting point as well as boiling point than water due to poor intermolecular forces (dipole forces, Vander Waal's forces).

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Answer: the answer is n= 0.487 mol

Explanation: i took the test and got it right

Answer:

1 ans:  d. all seeds has young plant, stored food and a seed coat.

2 ans: d. the right pollen is placed on their stigmas

3 ans: a. pollen grain falls on a pistil

4 ans: a. fire

5 ans: b. sexual

Hope it helps,

Please mark me as brainliest

Thank you...

Answer:

Oh so so sorry about that. and thanks for caring for us. anyway we are good wbu

Explanation:

im good. i just ate applesauce lol :)

Answer:

1281.25 Moles of glucose

Explanation:

Multiply 1.25x1025= 1281.25

Answer:

i dont know

Explanation:

Answer:

B.

Explanation:

Atoms make up molecules and ionic bonds cannot make up a molecule because they do not share electrons like in a covalent bond.