QUIZ 1: Gen. Chem. 1

When two or more substances are combined so each can be separated by physical means, the result is a(n)

• chemical change

• compounds

• mixture

• element

Which of the following is a substance?

• soda

• trail mix

• rocks

• gold

Some substances are chemically combined in specific combinations. These are *

• compounds

• heterogeneous mixtures

• homogeneous mixtures

• elements

A(n) is a substance that is made up of one kind of atom.

• atom

• element

• compound

• molecule

A(n) ______ is composed of two or more elements held together by chemical bonds.

• atom

• element

• compound

• molecule

A ______________ mixture is one that does not have a uniform composition.

• heterogeneous mixture

• homogenous mixture

• pure substance

• compound

Blood is a fluid found in the bodies of humans and other animals. It can be physically separated into plasma, red blood cells and white blood cells. Blood is a ___________________

• molecule

• mixture

• compound

• atom

Methane contains one atom of carbon and four atoms of hydrogen that are chemically bonded. It is a main component of natural gas. Methane is a ___________________ .

• element

• compound

• heterogeneous mixture

• homogeneous mixture

Chalk is a mineral found in rocks. It contains carbon, oxygen and calcium atoms. Chalk is a ___________________ .

• element

• compound

• molecule

• atom

The noble gases are a group of six substances with similar properties. They are odorless, colorless gases with low reactivity. They are group 18 on the periodic table. Each noble gas is a(n) _______ .

• element

• compound

• heterogeneous mixture

• homogenous mixture/solution