definitions Flashcards
1
Q
atom
A
smallest part of an element
2
Q
ion
A
formed when an atom loses or gains electrons.
- gives an overall charge
3
Q
molecule
A
consists of 2 or more atoms that have been bonded together chemically
4
Q
compound
A
a substance that combines two or more different elements through the formation of chemical bonds
5
Q
Relative atomic mass
A
the mean mass of an atom of an element divided by one twelfth of the mass of an atom of the carbon-12 isotope
6
Q
relative molecular mass
A
the mean mass of a molecule of a compound, divided by one twelfth of the mass of an atom of the carbon 12 isotope
7
Q
Empirical formula
A
simplest whole number ratio of atoms of each element in a compound
8
Q
molecular formular
A
actual number of each atom in a molecule.
