Question

An atom has 4 protons, 4 electrons and
5 neutrons. What is the atomic number
and mass number ?​

Answer 1

Answer:

atomic number will be same as no.of electrons that is 4 . and mass number will be same as no. of neutron that's 5

Explanation:

did you get it !?

Answer 2

Given ,

• An atom has 4 protons, 4 electrons and 5 neutrons

As we know that ,

Atomic number of an element is equal to the number of protons present in the nucleus of the atom of the element

$\sf \large \fbox{Atomic \: number = Number \: of \: protons </p><p></p><p>}$

Thus ,

Atomic number = 4

Now ,

Mass number of element is equal to the sum of number of protons and neutrons

$\large \sf \fbox{Mass \: number = Number \: of \: protons + Number \: of \: Neutrons }$

Thus ,

Mass number = 4 + 5

Mass number = 9

$\sf \therefore \underline{Atomic \: number = 4 \: and \: Mass \: number = 9}$