Which of the following is NOT a postulate of the kinetic-molecular theory?
A) Molecules of a gas move rapidly and in straight lines.
B) The molecules in a gas are tiny compared to the distance between them.
C) The molecules of a gas are strongly attracted to each other.
D) If two molecules collide with each other, the total energy of the molecules before the collision is the same as their total energy after the collision.
Question 2
How many protons are there in a phosphorus atom?
A) 31
B) 15
C) 17
D) 46
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