Question

Why are all of the substances on the periodic table classified as elements?

Substances on the periodic table cannot be broken down into other substances and are therefore elements.

Substances on the periodic table can be combined to form compounds and are therefore elements.

Substances on the periodic table cannot be dissolved in water or other liquids.

All elements are pure substances.
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Which subatomic particle has a negative charge?

electron


proton


neutron


all particles

Answer 1

Because just like compounds, the table of chemicals can be looked at as having all the different pieces of it. So the different chemicals are the different "elements" to the periodic table.