What is the largest atom in period 2 of the periodic table?

It depends on how you measure size.

http://dl.clackamas.cc.or.us/ch104-06/atomic_size.htm

Lithium is probably what you want.

Thank you I just figured it out

To determine the largest atom in period 2 of the periodic table, we need to look at the atomic numbers of the elements in that period. Period 2 includes the elements lithium (Li), beryllium (Be), boron (B), carbon (C), nitrogen (N), oxygen (O), fluorine (F), and neon (Ne).

The atomic number of an element represents the number of protons in its nucleus, which also determines its size.

In period 2, the atomic numbers increase from 3 (lithium) to 10 (neon). Therefore, the largest atom in period 2 is the one with the highest atomic number, which is neon (Ne). Neon has 10 protons, making it the largest atom in period 2.

Hence, the answer is neon (Ne).