Question

The subshell electronic configuration of element is given below . Idenify the period number and group number .
Cu: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s¹

Answer 1

Answer:

Copper (Cu) belongs to period 4 and group 11

Answer 2

Explanation:

1) The highest principal quantum present in the electronic configuration represents period number. Here copper is having the highest principal quantum number of 4 .So it belongs to period- 4. 2) Here the sum of number of d and s electrons is 11. So it belongs to group - 11.