Physical Science Review Quiz#1

Which is classified as an element?

• carbon dioxide

• iron

• vinegar

• water

Which best describes the sequence of the elements in Period 5 of the periodic table?

• highly reactive gases, relatively nonreactive metals, metalloids, very nonreactive gases, nonreactive nonmetals

• highly reactive metals, relatively nonreactive metals, metalloids, reactive nonmetals, nonreactive gases

• nonreactive gases, metalloids, nonreactive metals, highly reactive metals, highly reactive gases

• nonreactive gases, nonreactive metals, highly reactive metals, metalloids, reactive nonmetals, reactive gases

Which statement is true about a chemical reaction?

• The physical states of the atoms in the reactants determine the products.

• Some of the atoms in the reactants will be a part of the products

• The number of atoms in the reactants determines the products.

• All of the atoms in the reactants will be a part of the products.

Chlorine has 7 valence electrons. With what group of elements will chlorine most readily bond?

• group 1

• group 2

• group 16

• group 17

Which is the best example of a chemical change?

• butter melting

• egg cooking

• paper tearing

• water evaporating

Which chemical equation best represents the Law of Conservation of Mass?

• H + O → H2O

• H2 + O2 → H2O

• 2H2 + O2 → 2H2O

• H2 + O2 → 2H2O2

Which of the following best describes an element?

• A pure substance used to describe matter

• A substance that cannot be changed easily into another substance

• A substance that can only be found in mixtures

• A substance that is chemically combined

Which of the following represents a mixture?

• A piece of copper wire

• Air in the atmosphere

• Sugar

• A gold coin

H2O and H2O2 are two compounds that are formed by bonding hydrogen and oxygen.  These compounds demonstrate that

• Elements combine in many different ways to make compounds

• Elements combine randomly

• Both compounds are gases

• Hydrogen peroxide has more elements in it

You are trying to separate a mixture of water, sand and iron that are frozen together.  The mixture is relatively easy to separate because

• The substances are chemically combined

• The substances are physically combined

• The mixture is a homogeneous mixture

• The mixture is a solution