which correctly summarizes the trend in electron affinity? it tends to be very high for group 2. it tends to…

which correctly summarizes the trend in electron affinity? it tends to be very high for group 2. it tends to be more negative across a period. it tends to remain the same across periods. it tends to be more negative down a group.

which correctly summarizes the trend in electron affinity? it tends to be very high for group 2. it tends to be more negative across a period. it tends to remain the same across periods. it tends to be more negative down a group.

Answer

Brief Explanations:

Electron - affinity is the energy change when an electron is added to a neutral atom. Across a period, the nuclear charge increases and the atomic radius decreases, making it more favorable to add an electron (more negative electron - affinity). Group 2 elements have low electron - affinity due to stable electron configurations. Electron - affinity does not remain the same across periods and generally becomes less negative down a group due to increased atomic size and shielding.

Answer:

It tends to be more negative across a period.