How do i get the Protons without knowing its atomic number!!
mass number is total number of protons and neutrons.
Atomic mass is number of protons neutrons: 110 158 = 268
no. of protons is same as no. of electrons in a neutral atom . so in present case it is 109.
no. of nuetrons = 158.
mass no. = no. of p no. of n = 109 158 =267.
mass number is total number of protons and neutrons.
Source(s): my big brain
This post is last updated on hrtanswers.com at Date : 1st of September – 2022