1. How many atoms are in a water molecule?
2. Describe the structure of a water molecule.
3. How do water molecules form droplets of water?
4. Why is water called the universal solvent?
5. Explain how NaCI or table salt dissolves in water?

1. 3 atoms are required to form a molecule

2.structure in which a hydrogen atom is in a line between the oxygen atom on its own molecule and the oxygen on another molecule

3.When a pocket of air becomes full of water vapor, clouds form droplets those flat bottoms are where vapor begins to condense into water droplets.

4.because it is capable of dissolving more substances than any other liquid. This is important to every living thing on earth.

5.Salt (sodium chloride) is made from positive sodium ions bonded to negative chloride ions. Water can dissolve salt because the positive part of water molecules attracts the negative chloride ions and the negative part of water molecules attracts the positive sodium ions.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6