In an experiment, a pile of salt is mixed with food dye, dissolved in water, and then the resulting mixture is heated up. What kinds of properties of salt are being tested in this experiment?

• Chemical and Physical Properties

• Chemical Properties Only

• Physical Properties Only

When a salt water solution is separated using distillation, water is evaporated out of the solution and salt is left behind. During distillation, salt is undergoing a _____ change and water is undergoing a _____ change.

• physical; chemical

• chemical; chemical

• physical; physical

There are three kinds of subatomic particles:

I: protons

II: neutrons

III: electrons.

Which particles reside in the nucleus?

• II and III only

• I and II only

• I, II, and III only

• I and III only

Elements in the same group on the period table all have the same:

• ionization energy

• metal/nonmetal characteristics

• atomic size

• number of valence electrons

Which of the following examples represents a chemical change?

• Burning wood

• Mixing rocks and water

• Cutting vegetables

• Using a strainer to separate boiling water from cooked noodles.

The atomic number of an element is ALWAYS the same as the:

• Number of protons

• Number of electrons

• Number of neutrons

• Number of protons and electrons.

Rows on the periodic table are called ______, and columns on the periodic table are called _________.

• metals; nonmetals

• isotopes; ions

• orbitals; shells

• periods; groups

As you go from LEFT to RIGHT on the periodic table, elements typically change from:

• nonmetals to metals

• nonmetals to metalloids to metals

• metals to metalloids to nonmetals

• metals to nonmetals to metalloids

Which of the following observations would support a hypothesis that an unknown substance is a compound and NOT an element?

• The substance is a powder

• When heated, the substance melts

• When the substance reacts with Oxygen, it reacts to form TWO new substances.

• When the substance reacts with Oxygen, it forms ONE new substance.

The substance magnesium chloride is a(n) ________ compound with the chemical formula ______.

• metallic; Mg2Cl2

• molecular; Mg2Cl

• ionic; MgCl

• ionic; MgCl2