Understanding the Octet Rule and Electron Configuration

What does the octet rule state about atoms?

• Atoms transfer electrons randomly.

• Atoms always have eight electrons.

• Atoms strive to lose all electrons.

• Atoms aim to have eight electrons in their outer shell.

What do group numbers on the periodic table indicate?

• Total number of electron shells.

• Number of valence electrons.

• Number of neutrons in the nucleus.

• Number of protons in the nucleus.

How does magnesium achieve a stable electron configuration?

• By no change in electron number.

• By losing electrons.

• By gaining electrons.

• By sharing electrons.

What is the new charge of magnesium after losing two electrons?

• +1

• +2

• -1

• 0

How many electrons does nitrogen need to gain to complete its octet?

• Three

• Four

• One

• Two

What is the resulting charge on nitrogen after it gains electrons?

• +3

• -3

• 0

• +1

What happens to the electron cloud of an atom when it gains electrons?

• It disappears.

• It remains the same.

• It shrinks.

• It expands.

Which group of elements does not react with other elements?

• Halogens

• Noble gases

• Transition metals

• Alkali metals

What is the behavior of metals regarding their valence electrons?

• They lose electrons.

• They share electrons.

• They do not change.

• They gain electrons.

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How do nonmetals generally achieve a stable electron configuration?

• By sharing electrons.

• By gaining electrons.

• By removing electron shells.

• By losing electrons.