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

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

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?

Similar Questions

In a sample of ethyl ethanoate $(CH_{3}COOC_{2}H_{5})$,the two oxygen atoms have the same number of electrons but different number of neutrons. Which of the following is the correct reason for it?

The number of valence electrons in $Cl^{-}$ ion are

$(a)$ What are canal rays? Who discovered them? What is the charge and mass of canal rays?
$(b)$ How are the canal rays different from electrons in terms of charge and mass?

Dalton's atomic theory successfully explained which of the following laws?
$(i)$ Law of conservation of mass
$(ii)$ Law of constant composition
$(iii)$ Law of radioactivity
$(iv)$ Law of multiple proportion

Write any two observations which support the fact that atoms are divisible.

Vedclass Test Series

Exam Paper Generator

Online Exam Module