Atoms are arranged into subatomic particles that include protons,neutrons and electrons. Protons and electrons have a relative mass of 1 and electrons have a relative mass of negligible
Define what is meant by an atom and molecule
Atoms are the smallest particles of an element while molecules are compounds that have two or more atoms chemicallylinked together
Atomic number is the number of protons in an atom and massnumber is number of protons and neutrons in an atom
What is meant by isotopes?
Atoms of the same element with same number of protons but different number of neutrons
Relative atomic mass is calculated by massnumber of isotope A multiplied by percentageabundance of it
