PS Unit II, Quiz 1 Review

Which is the smallest piece of an element that still represents that element?

• A quark

• An electron

• An atom

• A molecule

How do the masses of neutrons, protons and electrons compare?

• Neutrons and protons are much larger than electrons

• Neutrons and protons are much smaller than electrons

• Protons and electrons are much larger than neutrons

• Protons and electrons are much smaller than neutrons

How do two ions of the same element differ?

• In the number of nuclei

• In the number of protons

• In the number of electrons

• In the number of neutrons

Which of the following represents a heterogeneous mixture?

• Image A

• Image B

• Image C

• Image D

Which of the following represents a homogeneous mixture?

• Image A

• Image B

• Image C

• Image D

Which of the following is a solution?

• Chlorine

• muddy water

• Salt water

• milk

A(n) _________ is made of two or more elements chemically combined in fixed ratios.

• Atom

• mixture

• Solution

• compound

Why is water sometimes called the universal solvent?

• Because all living things require water

• Because water is found all over the planet

• Because many different chemicals can dissolve in water

• Because in nature, water exists as a solid, liquid, and gas

Which is the substance being dissolved in a solution?

• The solute

• the insolvent

• The solvent

• The substrate

Polar molecules

• Have uneven charges

• Have more than one atom

• Attract ions

• All of the above