Question

question 6 of 10
how many valence electrons does b (boron) have?
a. 5
b. 13
c. 3
d. 10

Explanation:

Step1: Determine the electron configuration of boron

Boron has an atomic number of 5. Its electron configuration is \(1s^{2}2s^{2}2p^{1}\).

Step2: Identify the valence electrons

Valence electrons are the electrons in the outermost shell. For boron, the outermost shell is the second shell (\(n = 2\)). The number of electrons in the \(n=2\) shell is \(2 + 1=3\).

Answer:

C. 3