Question

what is atomic no.. ​

Answer 1

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

Answer:

Atomic number -

• The atomic number or proton number of a chemical element is the number of protons found in the nucleus of every atom of that element.

Explanation:

• The atomic number uniquely identifies a chemical element.
• It is identical to the charge number of the nucleus.
• The symbol for an atom can be written to show its mass number at the top, and its atomic number at the bottom.
• To calculate the numbers of subatomic particles in an atom, use its atomic number and mass number: number of protons = atomic number. number of electrons = atomic number.