Question

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.

Explanation:

Electron - affinity generally becomes more negative across a period. This is because as you move across a period, the nuclear charge increases while the shielding effect remains relatively constant, making it easier to add an electron. Group 2 elements have low electron - affinities due to their stable electron configurations. Electron - affinity does not remain the same across periods and usually becomes less negative down a group due to increased atomic size and shielding.

Answer:

It tends to be more negative across a period.