Oxygen, with an atomic number of 8, has __________ electrons in the first energy level and __________ electrons in the second energy level.
A)1; 7
B)2; 6
C)3; 5
D)4; 4
E)5; 3

Question

Quizplus · Accepted Answer

The first energy level can only hold a maximum of 2 electrons. Oxygen has 8 electrons, so it fills the first energy level with 2 electrons and the remaining 6 electrons go into the second energy level, which can hold up to 8 electrons. Therefore, there are 2 electrons in the first energy level and 6 electrons in the second energy level, making the correct answer choice B.

Oxygen, with an Atomic Number of 8, Has __________ Electrons