Why is Chlorine in its position on periodic table? Can it fit into another spot?

Chlorine has about 15 known isotopes. Even hydrogen has three.

An elemental isotope has a specific number of neutrons. Neutron content of the nucleus does not affect chemical properties. It’s the electrons that determine an atom’s chemical properties and so set its position in the Periodic Table of the Elements. An atom (not an ion) has the number of electrons equal to the number of protons so that it is neutral. Electrons have an electrical charge exactly equal in absolute value and opposite in sign to protons.

Figuring out how electrons determine chemical properties was one of the great triumphs of quantum mechanics.

Explanation:

the law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. because atoms are only rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both the reactants and products

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error