Case 14 Vocabulary: Molecules and Compounds

What is the smallest unit of an element that retains the properties of that element?

• Molecule

• Atom

• Compound

• Mixture

Which term describes a substance made of only one kind of atom?

• Compound

• Element

• Mixture

• Molecule

What is a chemical bond?

• A type of atom

• A force that holds atoms together

• A mixture of substances

• A chemical formula

Which of the following is a pure substance?

• Air

• Salt water

• Soil

What does a subscript in a chemical formula represent?

• The number of molecules

• The number of atoms of an element in a molecule

• The type of chemical bond

• The total mass

Which of the following best describes a mixture?

• A substance made of only one type of atom

• A combination of two or more substances that are not chemically bonded

• A substance with a fixed chemical formula

• A molecule with two atoms

What does the coefficient in a chemical equation indicate?

• The number of atoms in a molecule

• The number of molecules or formula units

• The type of element

• The ratio of elements

Tags

NGSS.MS-PS1-5

Which of the following is an example of a compound?

• Gold

• Air

Tags

NGSS.MS-PS1-1

Which term refers to the arrangement of atoms in a molecule?

• Ratio

• Structure

• Coefficient

• Subscript

Tags

NGSS.MS-PS1-1

• Two carbon atoms

• Two oxygen atoms

• Two molecules

• Two compounds

Tags

NGSS.MS-PS1-1