In which of the following is the name and formula paired correctly? A) ammonium sulfate, (NH4)2S
B) lithium carbonate, LiCO3
C) iron (III) phosphate, FePO4
D) magnesium dichromate, MgCrO4

by cartels in other countries, shipped by air, mail, or land. i cant really see your answer choices : /

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.