Question

atoms tend to be stable when they have a full valence shell. most main - group elements require eight valence electrons to have a full valence shell. for this reason, atoms of most main - group elements will share, gain, or lose valence electrons until their valence shells contain eight electrons, or an octet. this observation is known as the octet rule. some atoms, like hydrogen and helium, do not obey the octet rule and are stable when they have two electrons in their valence shell. compare the bohr models of neon and oxygen. complete the sentences. an oxygen atom is than a neon atom. an oxygen atom will to fill its valence shell.

Explanation:

Neon has a full - valence shell with 8 electrons in its outermost shell, making it stable. Oxygen has 6 electrons in its outermost shell. According to the octet rule, atoms are stable with a full valence shell (8 electrons for most main - group elements). Oxygen is less stable and will gain electrons to fill its valence shell.

Answer:

An oxygen atom is less stable than a neon atom. An oxygen atom will gain electrons to fill its valence shell.