Question

question 7 of 10 how many valence electrons does b (boron) have? a. 5 b. 3 c. 13 d. 10

Explanation:

Step1: Recall boron's atomic number

Boron has an atomic number of 5. Its electron - configuration is 1s²2s²2p¹.

Step2: Identify valence electrons

Valence electrons are in the outermost shell. For boron, the outermost shell is the second shell (n = 2), and it has 2 + 1=3 electrons.

Answer:

B. 3