A certain atom has 11 electrons 8 neutrons and a charge of -1. What is it’s atomic mass
Chemistry · Middle School · Tue Nov 03 2020
Answered on
Given:
A certain atom has 11 electrons 8 neutrons and a charge of -1
Determine the atomic mass.
Atomic Number = Number of Protons = Number of Electrons
Mass Number = Number of Protons/Number of Electrons + Number of Neutrons
Number of Protons = Number of Electron + charge
Solution:
We know that the atomic number is equal to the number of protons and number of electrons, hence since we are given a charge, we will calculate first the number of protons by taking away the charge of the electron.
Number of Protons = 11 - 1
Number of Protons = 10
Since we know the number of protons, we can add it to the number of neutrons in order to get the atomic mass.
Atomic mass = 10 + 8
Atomic mass = 18
Final answer:
Atomic mass = 18