Identify 3 elements and 3 compounds. how are they the same? how are they different?

The answer to your question is below

Explanation:

         Elements                                Compounds

1.-      Cu   (Copper)                          NaCl  (sodium chloride)

2.-     Ag   (Silver)                              HNO₃ (nitric acid)

3.-     Al (aluminum)                          KOH (potassium hydroxide)

They are similar because that are composed by elements, they are different because elements are composed by only 1 element and compounds are composed by 2 or more elements.

Elements are simple and compounds are more complex structures.

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.

particle   p is an electron and particle q is a neutron