Question

An element A has atomic number 28. What is the electronic configuration of the elemets below it in the periodic table Predict the chemical properties.

Answer 1

Element 28 has electronic configuration of 1s^​22s²2p⁶3s²3p⁶4s²3d⁸.
Element below this has ​electronic configuration of 1s^​22s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d⁸.
Both have same valence electron. So their chemical properties are same.

These metals are silvery-white metal.
They are hard metal.
They are malleable, and ductile metals
They are good conductor of heat and electricity.
They have a valency of two.
These metal dissolves in dilute acids.