Exploring the Octet Rule and Valence Charges

What does the octet rule state?

• Atoms will gain or lose electrons to have a full outer shell of eight electrons.

• Atoms will always gain electrons to have a full outer shell.

• Atoms will always lose electrons to have a full outer shell.

• Atoms will neither gain nor lose electrons.

Which family of elements naturally has a full outer shell of eight electrons?

• Transition metals

• Noble gases

• Halogens

• Alkali metals

What do group numbers in the periodic table indicate?

• The atomic mass of the element

• The number of outer shell electrons

• The number of neutrons in an atom

• The number of protons in an atom

How many valence electrons do elements in Group 1 have?

• Four

• Three

• Two

• One

If an atom has more than four valence electrons, what will it do to achieve an octet?

• Share electrons

• Neither gain nor lose electrons

• Gain electrons

• Lose electrons

What happens to an atom with less than four valence electrons?

• It gains electrons to fill its outer shell.

• It loses electrons to fall back to its core octet.

• It neither gains nor loses electrons.

• It shares electrons with other atoms.

What is the electron configuration of magnesium?

• 1s2 2s2 2p6 3s1

• 1s2 2s2 2p6 3p2

• 1s2 2s2 2p5 3s2

• 1s2 2s2 2p6 3s2

Tags

NGSS.HS-PS1-1

What is the new charge of magnesium after it loses two electrons?

• 0

• 2+

• 1+

• 2-

How many electrons does nitrogen need to gain to achieve an octet?

• Two

• Three

• Four

• One

What is the overall charge of nitrogen after gaining three electrons?

• 3+

• 3-

• 1+

• 2-