2.1 Atoms and Reactions

What are isotopes?

Atoms of the same element with different number of neutrons and different masses

Why do isotopes have similar chemical properties?

Chemical reactions involve electrons, all these isotopes have the same number of electrons

What is relative isotopic mass?

The mass of an atom of an isotope compared with 1/12 of the mass of an atom of carbon-12

What is relative atomic mass?

The weighted mean mass of an atom of an element compared with one 1/12 of the mass of an atom of carbon-12

How do you calculate the relative atomic mass?

Ar = (mass x abundance)/100 +(mass x abundance)/100