31. How do particles of solid move?
a. Particles in a solid vibrate in place.
b. Particles in a solid are close together. c. Particles in solid slide past each other. d. Particles in a solid move rapidly with each other.

32. If water undergoes sublimation, it moves directly from
a. Solid to gas
c. Solid to liquid Gas to liquid
b. Gas to liquid
d.

33. Which is the correct way to write the chemical symbol of Iron?
a. FE
c. Fe
b. fE
d. fe

34. Atom of the elements that are in the same group has the same group have the same number of
a. Protons
c. Valence electrons
b. Neutrons
d. Protons and neutrons

35. How does a physical change differ from a chemical change?
a. New materials are produced.
b. The change always involves heat or light.
c. New properties of the matter are observed.
d. The composition of the matter is unchanged.

36. Which of the following signs does NOT indicate that a chemical change has happened?
a. foaming or bubbling
c. change in color or odor
b. only a change in state
d. production of heat or light

37. A subatomic particle that has a negative charge is called a(n).
a. molecule
c. element
b. electron
d. compound

38. Which of the following statements is NOT true?
a. Neutrons have no charge.
c. A nucleus has a positive charge.
b. Protons have a positive charge.
d. Neutrons have a negative charge. 3

39. How much effect do high percent abundance isotopes have on the average atomic mass of an element?
a. no effect on atomic mass.
C. same as low percentage isotopes.
b. less than low percentage isotopes
d. more than low percentage isotopes

40. Two different isotopes of an element have different_
a. atomic numbers
c. numbers of neutrons
b. numbers of electrons
d. numbers of protons 11 Which​