EL 1 - Where do the chemical elements come from?

Question 1

What is the mass of a proton, electron and neutron?

Answer 1

proton: 1
electron: 1/1840 (or 0.00055)
neutron: 1

Question 2

What is the charge of a proton, electron and neutron?

Answer 2

proton: +1
electron: -1
neutron: 0 (no charge)

Question 3

How do you work out the relative atomic mass?

Answer 3

multiply the relative abundance of each isotopes to their mass numbers + add them together then divide by 100

Question 4

What is an isotope?

Answer 4

elements that have the same number of protons but a different number of neutrons