Compared to the mass of a hydrogen atom, the mass of an oxygen atom is
A) 8 times as great.
B) 12 times as great.
C) 16 times as great.
D) appreciably more than 16 times as great.
Question 2
Heavier atoms are not proportionally larger than lighter atoms due to the greater number of protons
A) pulling surrounding electrons into tighter shells.
B) squeezed into tighter spaces.
C) both of these
D) none of these