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1. how does the particle model explain the difference in volume between a solid and a liquid of the same substance?

a. solid particles are larger than liquid particles.
b.solid particles are more closely packed than liquid particles.
c.solid particles have a fixed arrangements, while liquid particles can move freely.
d.solid particles have less kinetic energy than liquid particles.

2. which of the following is a key component of the particle model of matter?

a. particles are in constant motion.
b. particle have a fixed size and shape.
c. particles are made up of protons and neutrons.
d. particles are arranged in a hierarchical structure.​