Physics revision

Physics revision

1. The nuclear model has positive charges in the centre.

2. Plum pudding model has a single ball of positive charge.

3. A difference between a helium atom and an alpha particle is a helium atom has 2 electrons.

4. Atoms of different beryllium isotopes have different numbers of neutrons.

5. To change a structure of an atom into an ion it loses/gains electrons.

6. A half life is the amount of time it takes for half of its atoms to decay.