chemistry revision c3

metals in group 1,2,3 form what ions?

Positive
elements in group 5,6,7 form what ions?

Negative
what is the law of conservation of mass?

Atoms cant be created or destroyed in a chemical reaction. The same atoms are present at the beginning and end.
What is a mole?
(not the animal)

The mole is a unit used for measuring the amount of tiny particles, such as electrons, molecules or atoms, you have.
what is Avogadro's number?

6.02×10²³
How do you calculate the mass of the reactants or products?

mass (g) = molar mass (g/mol)×amount in mol

Author

Jake07

331351

Card Set

chemistry revision c3

Description

self explanatory

Updated

2017-05-11T13:58:08Z