Chemistry Flashcards
1
Q
Define a compound
Give an example
A
One type of molecule which contains more than one kind of atom
Calcium carbonate
Carbon dioxide
Potassium maganate
2
Q
Define a mixture
Give an example
A
Contain more than one kind of molecule
Air
3
Q
Explain the difference between atoms, molecules and elements
A
Atoms - the smallest particles; ie the building blocks of all substances
Molecules - atoms chemically bound together
Elements - contain only one sort of atom
4
Q
What is the equation for atomic mass?
A
The mass of one atom of the element ÷ the mass of one atom of hydrogen
5
Q
How do you work out the mass of a molecule?
A
Add the atomic masses of the atoms present together.
For example carbon dioxide is made of 1 atom of carbon and 2 atoms of oxygen
Therefore 12 + (2 x 16)
= 44
