<span><span>Number of Protons-19 </span><span>Number of Neutrons-20 </span><span>Number of Electrons-<span>19</span></span></span>
BECAUSE:
Chlorine<span> is a </span>gas at room temperature.<span>The melting/boiling point of a substance determines what state of matter it takes at a certain temperature.</span>
Answer:
covalent bond- a chemical bond that is the sharing of electron pairs between atoms
