I NEED HELP Now write the abbreviated electron configuration for calcium. However, substitute [Ar] for the 1st 18 electrons of calcium. What is the electron configuration now?

[Ar]4s²

Explanation:

The electronic configuration of calcium is given as follows;

1s²2s²2p⁶3s²3p⁶4s²

The electronic configuration of argon, Ar is 1s²2s²2p⁶3s²3p⁶

Given, that there is a similarity be tween the electronic configuration of all the shells of the an atoms of argon and an atom calcium, except for the added valence shell electrons in calcium, the electronic configuration of calcium can be represented by the symbol of an atom of argon, followed by the electonic configuration of the valence shell as follows

The electronic configuration of calcium with argon as base = [Ar]4s².

b..

is the correct one

explanation:

covalent bonds form as valence electrons are shared between two atoms. lewis structures and structural formulas are common ways of showing the covalent bonding in organic molecules. formal charge describes the changes in the number of valence electrons as an atom becomes bonded into a molecule.