I agree with him I also think it is #2 but it's hard to explain, it just makes more sence...
hope this helps!
<span>Because it has very weak intermolecular meaning it takes little energy to break them and turn it into a gas</span>
Answer:
(A) Mixture; physical; (B) compound; chemical; (C) mixture; physical
Explanation:
(A) Orange liquid
Mixture — Red solid dissolved in yellow liquid gives orange solution
Physical change — separated by distillation with no change to the substances
(B) Crystalline solid
Compound — decomposition converts a substance into two or more different substances with different properties.
Chemical change — new substances formed.
(C) Cup of tea
Mixture — sugar is dissolved in the tea
Physical change — the tea and sugar retain their original properties.
<span>each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties.</span>
The answer is C: R
hope this helps :)