The Periodic Table is arranged according to? the number of electrons that each element has.
the boiling point of the elements.
the reactivity of the elements.
the number of protons each element has.

The number of protons each element has.

Explanation:

The number of protons each element has is also known as the atomic number. Elements are arranged from left to right and top to bottom in order of increasing atomic number. The order generally coincides with increasing atomic mass. The rows are called periods.

gas

explanation:

smoke is the matter of a gas