Question

24 using a periodic table, write the full electron configuration of bromine (br) so that all the subshells in each principal energy shell are grouped together.

Explanation:

Step1: Determine atomic number of bromine

Bromine has an atomic number of 35, so it has 35 electrons.

Step2: Fill electrons according to Aufbau principle

Start filling sub - shells in order of increasing energy: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁵.

Answer:

1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁵