1. 1. 2. 3. Y11 INTERVENTION : Isotopes and atomic structure
5 mins EXAM CONDITIONS demand 1 Question (grade 4/5)
5 mins go through mark scheme 2.
10 mins Walking talking demand 2 Question (grade 6/7) 3.
5 mins EXAM CONDITIONS demand 3 Question (grade 8/9)
5 mins go through mark scheme

2. 1.
5 mins

3. 1. proton electron neutron
5 mins
neutron
Mass number = No of protons + No of neutrons

4. 1. 2. 3. Y11 INTERVENTION : Isotopes and atomic structure
5 mins EXAM CONDITIONS demand 1 Question (grade 4/5)
5 mins go through mark scheme 2.
10 mins Walking talking demand 2 Question (grade 6/7) 3.
5 mins EXAM CONDITIONS demand 3 Question (grade 8/9)
5 mins go through mark scheme

5. 2.
10 mins

6. 2. Pudding part contains an equal amount
10 mins
Pudding part contains an equal amount
of positive charge – all spread out evenly
Most of an atom is empty space
The nucleus is positive
/ has the same charge as the alpha
The nucleus is very small
/ has a concentrated charge
Experimental results did not support
the plum pudding model
The results prove that
the new nuclear model was correct

8. 1. 2. 3. Y11 INTERVENTION : Isotopes and atomic structure
5 mins EXAM CONDITIONS demand 1 Question (grade 4/5)
5 mins go through mark scheme 2.
10 mins Walking talking demand 2 Question (grade 6/7) 3.
5 mins EXAM CONDITIONS demand 3 Question (grade 8/9)
5 mins go through mark scheme

9. 3.
5 mins

10. 3. alpha Mass number goes down by 4 K L
Isotopes of the same element have the same number of protons
Isotopes of the same element have different numbers of neutrons 3.
5 mins 90
140
230 – 90 =

11. 1. 2. 3. Y11 INTERVENTION : Isotopes and atomic structure
5 mins EXAM CONDITIONS demand 1 Question (grade 4/5)
5 mins go through mark scheme 2.
10 mins Walking talking demand 2 Question (grade 6/7) 3.
5 mins EXAM CONDITIONS demand 3 Question (grade 8/9)
5 mins go through mark scheme