Question

define atomic number ?​

Answer 1

Explanation:

• Atomic number, the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus. Accordingly, the number of protons, which is always equal to the number of electrons in the neutral atom, is also the atomic number.

Answer 2

The total number of electrons or protons present in an electrically neutral atom is called atomic number.

Atomic number = No. of electrons = no.of protons

For example, atomic number of phosphorous is 15 that means an atom of phosphorous contains 15 electrons and 15 protons.