Give two similarities and differences between cl and cl-

They both represent an element, But Cl is neutral atom while Cl - is an ion. The ion has a more stable structure than the atom, having an inert gas structure The ion can join with + ive ions and form an ionic bond. The neutral atom can form a compound sharing a pair of electrons in a covalent bond, and thereby completing its outer shell.

First of its Cl and Cl-, /

Simularities

Same element

Same prefix when writing chemical equation

Differences

Cl is a chlorine ion

Cl orginally when found naturally in nature has no charge, Cl - has a negative charge