The number of electrons in an element X is 15 | vedclass

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Question

(B) In a neutral atom, the number of electrons is equal to the number of protons, which is the atomic number $(Z)$.Given: Number of electrons = $15$,

Vedclass · Accepted Answer

$_{15}^{31}X$

Vedclass · Answer

(B) In a neutral atom, the number of electrons is equal to the number of protons, which is the atomic number $(Z)$.Given: Number of electrons = $15$, so Atomic number $(Z)$ = $15$.The mass number $(A)$ is the sum of the number of protons and neutrons.$A = Z + 	ext{Number of neutrons} = 15 + 16 = 31$.The standard representation of an element is given by $_{Z}^{A}X$, where $A$ is the mass number and $Z$ is the atomic number.Therefore, the correct representation is $_{15}^{31}X$.

The number of electrons in an element $X$ is $15$ and the number of neutrons is $16$. Which of the following is the correct representation of the element?

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