Question

Define atomic number

Answer 1

The number of protons and electrons normally found in an atom of a given chemical element.

Answer 2

Answer:

Explanation:

Atomic number is the number of protons in the atom. It is the characteristic of a particular element.

Note: Protons are not responsible for the chemical properties of the element, but the number of electrons. Since during a reaction, an atom may gain or lose electrons, we use the equal of number of electrons, i.e. number of protons.

For example, the atomic number of hydrogen is 1, since it has 1 proton. The atomic number of oganesson is 118, since it has 118 protons.

The periodic table arranges the element in order of atomic number.