The atomic size of Na is greater than Li because:
A. Na has three shells, whereas Li has two shells in its atom
B. The atomic number of Na is greater than Li
C. As we go down a group, distance between outermost electrons and nucleus decreases.
D. The mass of Na atom is greater than Li atom
Answer:D
The atomic size of Na is greater than Li because:
A. Na has three shells, whereas Li has two shells in its atom B. The atomic number of Na is greater than Li C. As we go down a group, distance between outermost electrons and nucleus decreases. D. The mass of Na atom is greater than Li atom