Home
Class 12
CHEMISTRY
The mass number of an element 'X' is 'A'...

The mass number of an element 'X' is 'A' . If `X^(4+)` contain 16 electrons and 20 neutrons, then calculate the value of `(A)/(10)` is -

A

2.6

B

4

C

3.2

D

3

Text Solution

Verified by Experts

The correct Answer is:
B
Atomic mass `= n + p, A^(+4)` has 16 electrons, thus A has 20 electrons, so `A = 20 + 20 = 40`
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

The mass number of element 'X' is 'A' . If X^(4-) contains 10 electrons and 6 neutrons , then the value of A/3 is

(a) Describe the Rutherford's model of an atom. State one drawback of Rutherford's model of the atom (b) The mass number of an element is 23 and it contains 11 electrons. What is the number of protons and neutrons in it ? What is the atomic number of the element ?

An atom of an element contains "29" electrons and "35" neutrons. The electronic configuration of the element is

The atom of an element has 9 protons, 9 electrons and 10 neutrons. What is the mass number of the element?

Y is the ion of an element X. Y contains 13 protons, 14 neutrons and 10 electrons. What is the nucleon number of Y?

An atom of element X contains 3 protons, 3 electrons and 4 neutrons: What could element X be?

An atom of element X contains 3 protons, 3 electrons and 4 neutrons: What is its atomic number?