Chapter 2 ATOMS, IONS & COMPOUNDS

Cards (9)

What is the relative atomic mass?
The weighted mean mass of an atom of an element relative to 1/12th the mass of an atom of carbon-12
What is the relative isotopic mass?
The mass of an isotope relative to 1/12th the mass of an atom of carbon-12
What are isotopes?
Atoms of the same element with different number of neutrons but the same number of protons
What is an ion?
An ion is a charged atom so the number of electrons isn't equal to the number of protons
What is the purpose of neutrons?
Act as a buffer between protons to prevent the nucleus exploding
What is a cation?
A positively charged ion that has lost electrons
What is an anion?
A negatively charged ion that has gained electrons
What are binary compounds?
Compounds composed of two different elements.
What are polyatomic compounds?
Compounds containing atoms of more than one element