chemical reactions Flashcards
1
Q
what is an element
A
a substance contains only one Type Of atom e.g. Ms, 02
2
Q
what is a compound
A
a substance containing two or more different types of atoms CHEMICALLY BONDED e.g. H20
3
Q
what does the conservation of mass say
A
atoms cant be created or destroyed in a reactions so the equation must be balanced
