Question

Elements have been discovered with up to ________ energy levels.

A. 5
B. 6
C. 7
D. 8

Answer 1

The answer is 7 hope this helps

Answer 2

The best answer I think is 7.  If you look at the periodic table, there are 7 periods and each period has a new energy level.  Because of that, I don't think an element can naturally have more than 7 energy levels, however, it might be possible for an electron in the 7th energy level to briefly go up to an exited state due to energy being added.