Question

The atomic mass of an element whose atoms consist of eight protons, nine neutrons, and eight electrons is _____.

Answer 1

atomic mass =no.of proton +no. neutron
= 8+9
=17

Answer 2

Every single element present on the earth is made up with several independent particles ,which are known as the atoms.

This atoms contain three main types of sub-particles,which are known as the proton,the neutron and the electron.

To calculate the mass of any particle ,we have to add the mass of particle's total protons and neutrons.Electrons are very negligible in the terms of weight that's why we didn't count it in the atomic mass.

According to the question, the particle's atomic mass will be;

=Number of protons + number of neutrons

=8+9

=17