Keeps the earth from becoming too hot during the day and too cold at night.

a. insulation
b. the greenhouse effect
c. solar radiation
d. air conditioning

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

Can someone me with questions 12 and 13 plz.

Which element would mostly likely have an electron affinity measuring closest to zero