What do think the answer is and why?
Oxygen is 1s2 2s2 2p4
Which of the following statements correctly describes energy levels?
A. Electrons can never move to a higher or lower energy level.
B. In its outermost energy level, oxygen has 4 valence electrons
C. The second energy level holds a maximum of eight electrons.
D. The greater the energy of the level, the father away it is from the nucleus.
1 answer
1 answer