Question

The mass number of an atom is obtained by totaling the number of _____ and _____. (1 point)

electrons and protons
electrons and neutrons
protons and neutrons
neutrons and isotopes

2. Which of the following statements about the chemical combination of atoms to form compounds is NOT true?

(1 point)

Compounds form when atoms are more stable in a combined form.
When atoms combine, they gain, lose, or share electrons.
When atoms combine, they are at a lower energy state.
Compounds form when atoms are less stable in a combined form.

3. Compounds with high melting points have ___