Question

question 39 (1 point)
how many core electrons does oxygen have ?
1
a. 0 b. 1 c. 2 d. 3 e. 4 f. 5 g. 6
h. 7 i. 8 j. 9 k. 10 l. 11 m. 12 n. 13
o. 14 p. 15 q. unknown r. infinite s. beyond infinite
t. too many, needs to share already

Explanation:

Step1: Recall oxygen's electron - configuration

Oxygen has an atomic number of 8. Its electron - configuration is $1s^{2}2s^{2}2p^{4}$.

Step2: Identify core electrons

Core electrons are the electrons in the inner shells. For oxygen, the inner shell is the first shell ($n = 1$) which has 2 electrons. The electrons in the $1s$ orbital are the core electrons.

Answer:

C. 2