What is electron affinity?

• The energy required to add a neutron to an atom

• The energy change when an atom loses a proton

• The energy change when an electron is added to a neutral atom

• The energy required to remove an electron from an atom

Which element releases the most energy when an electron is added?

• Fluorine

• Oxygen

• Carbon

• Boron

What happens to electron affinity as you move across a period?

• It increases

• It remains constant

• It decreases

• It fluctuates randomly

Why does electron affinity generally increase across a period?

• Decrease in atomic size

• Increase in nuclear charge and effective nuclear charge

• Increase in electron shielding

• Decrease in nuclear charge

What is the electron configuration of nitrogen?

• 1s2 2s2 2p3

• 1s2 2s2 2p4

• 1s2 2s2 2p6

• 1s2 2p3

Why does nitrogen have an electron affinity of zero?

• It has a high atomic mass

• It has a low nuclear charge

• It has a half-filled p subshell causing electron-electron repulsion

• It has a full outer shell

What is the electron configuration of neon?

• 1s2 2s2 2p4

• 1s2 2s2 2p3

• 1s2 2p6

• 1s2 2s2 2p6

Why does neon have an electron affinity of zero?

• It has a half-filled p subshell

• It has a full second energy level and requires a new shell for additional electrons

• It has a low nuclear charge

• It has a high atomic mass

What is the effect of electron shielding in neon?

• It increases the nuclear charge

• It increases the attraction of the nucleus for added electrons

• It decreases the attraction of the nucleus for added electrons

• It has no effect on electron affinity

What is the main reason for the instability of neon's anion?

• High atomic mass

• Lack of electron shielding

• Excessive nuclear charge

• Insufficient nuclear charge to attract additional electrons