(25 POINTS! WILL GIVE BRAINLIEST! HOMEWORK DUE SOON!!) The actual electron affinity of Phosphorus is lower than Sulfur, which is different than expected from the trend.

Considering what you know about electron configurations and the trend, explain why this might occur. Make sure you are explicit and specific in your answer.

What other elements might you check the electron affinity for on the periodic table to support your thinking?

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6