Answer:
I’m trying to do something similar to that
Explanation:
C
Why? As you increased energy levels the distance between two energy levels gets larger. This is often due to shielding
Answer:
(a)
(b) 
Explanation:
The reaction that is carried out by the enzyme catalase produces
The reaction that is carried out by the enzyme catalase produces 
I believe it is because, Lead has a higher boiling point than zinc. by the time Lead melts and becomes a liquid, the temperature is way higher than the boiling point of Zinc therefore, Zinc becomes a gas.