Question

For a hypothetical ion X^-2. If it has atomic number (z) = 14 aand mass number (A) = 30. Then sum of electrons protons and neutrons present in X^+2 is ?​

Answer 1

Given: For a hypothetical ion $X^{-2}$ has an atomic number (z) = 14 and mass number (A) = 30.

To find: We have to find the sum of electrons protons and neutrons present in $X^{+2}$.

Solution:

For a hypothetical ion $X^{-2}$ has an atomic number (z) = 14 and mass number (A) = 30.

So, the number of the proton is 14 and the number of the neutron is 30-14=16.

Now the number of the electron is equal to 14+2=16.

For $X^{+2}$ the number of proton and neutron remain the same but the number of the electron is 14-2=12.

So, the sum of electrons protons and neutrons is equal to 12+14+16=42.

The sum of electrons protons and neutrons in $X^{+2}$ is 42.