Question

write electronic configuration of element of first transaction series​

Answer 1

Answer:

The valence configuration for first series transition metals (Groups 3 - 12) is usually 3dn 4s2. Exceptions: The electron configurations for chromium (3d5 4s1) and copper (3d10 4s1). ... The 3d5 4s1 configuration is of lower energy because this configuration has the maximum number of unpaired electrons for a d-subshell