Question

the atomic number of an elements is 8.number of neutrons present are 9.find out mass number and number of electron ​

Answer 1

Answer:

The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.

Answer 2

Explanation:

the total number of protons and neutrons in an atom

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