An atom with atomic number 9 and mass number | vedclass

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Question

(A) The atomic number $(Z)$ of an atom is equal to the number of protons $(p)$ in its nucleus. Here,$Z = 9$,so the number of protons is $9$.In a neutr

Vedclass · Accepted Answer

$9 p, 10 n, 9 e$

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(A) The atomic number $(Z)$ of an atom is equal to the number of protons $(p)$ in its nucleus. Here,$Z = 9$,so the number of protons is $9$.In a neutral atom,the number of electrons $(e)$ is equal to the number of protons. Therefore,the number of electrons is $9$.The mass number $(A)$ is the sum of the number of protons and neutrons $(n)$.$A = p + n$$19 = 9 + n$$n = 19 - 9 = 10$.Thus,the atom has $9$ protons,$10$ neutrons,and $9$ electrons.

An atom with atomic number $9$ and mass number $19$ will have the following constituents:

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