Cl₂ is a compound
<h3>Further explanation</h3>
Pure substance can be any element or compound
Elements if composed of one atom
A compound if it is composed of two or more atoms, either of the same type or of different types
Cl₂ consists of 2 Cl atoms.
Cl with 7 valence electrons will try to get its stability by binding 1 more electron, by covalently bonding with other Cl atoms to form a Cl₂ compound in the form of a gas
Answer: an aqueous potassium hydroxide solution
An alkaline fuel cell is a zero-emission device whose one major component is the electrolyte. An electrolyte, on the other hand, is a solution that is able to conduct electricity. In an alkaline fuel cell. The electrolyte is an alkaline liquid, and potassium hydroxide also known as KOH is the only alkaline liquid among the choices.
The answer would be Rutherford inferred the existence of a dense, positively charged nucleus.
