Definitions Flashcards
1
Q
define nucleon number
A
total number of protons and neutrons in an atom
2
Q
define isotopes
A
atoms of the same element with the same number of protons and electrons but different number of neutrons
3
Q
define relative atomic mass
A
average mass of an atom compared to 1/12 the mass of a carbon-12 atom
4
Q
define relative molecular mass
A
average mass of a molecule compared to 1/12 the mass of a carbon-12 atom
5
Q
what is an element?
A
a pure substance that cannot be broken down into simpler substances
6
Q
what is a compound?
A
a pure substance made up of two or more different elements chemically combined in fixed ratio
