Question

What is the shell number for the outer shell electrons in bromine, Br?

a. 4
b. 3
c. 5
d. 6

Answer 1

The shell number for the outer shell electrons in bromine (Br) is 3.

Step-by-step explanation:

The shell number for the outer shell electrons in bromine (Br) is b. 3.

Based on the information provided, shells 1, 2, and 3 are full, and shell 4 has one electron. Since the outermost electrons are in shell 4, the shell number is 3.

Answer 2

A. 4

Step-by-step explanation:

Bromine (Br) is in the 17th group (Group 17 or VIIA) of the periodic table. Elements in Group 17 are known as halogens. The electron configuration for bromine is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5.

The outermost electron shell is the fourth shell, which contains the electrons in the 4s and 4p subshells. Therefore, the answer is A.