Unit 1.3 Vocabulary Flashcards
1
Q
Chemical formula
A
Shows the elements in the compound and the ratio of atoms
2
Q
Elemental composition
A
Calculating the percentage composition of any element in a substance
3
Q
Empirical formula
A
A chemical formula showing the ratio of elements in a compound rather than the total number of atoms
4
Q
Pure substance
A
A sample of matter, either a single element or a single compound, that has definite chemical and physical properties
5
Q
Molecules
A
Groups of two or more atoms held together by chemical bonds
6
Q
Atoms
A
smallest unit of matter
7
Q
Ions
A
positively and negatively charged atoms
8
Q
Fixed proportion
A
the ratio of elements is the same in every particle of the compound
9
Q
Formula Unit
A
the lowest whole-number ratio of ions in an ionic compound
