Intro to Elements

How many different types of atoms are there in the following molecule?

• 7

• 6

• 3

• 8

Which of the diagrams below represent a mixture?

• A

• B

• C

• D

A __ mixture is a mixture in which the composition is not uniform throughout the mixture.

• element

• homogeneous

• compound

• heterogeneous

Which of the following is a homogeneous mixture?

• sand in a bottle

• mercury

• lemonade

• salad

How many atoms are present in one molecule of glucose, C₆H₁₂O₆.

• 3

• 12

• 24

• 4

An element is a ___ that cannot be separated into simpler substances by physical or chemical means.

• pure substance

• mixture

• solution

• compound

__ is a pure substance containing two or more kinds of atoms.

• element

• compound

• mixture

• solution

Water is made up of hydrogen and oxygen, two elements that were chemically combined. This makes water a(n)

• atom

• element

• compound

• mixture

What is aluminum (Al)?

• element

• compound

• mixture

What is table salt (NaCl)?

• element

• compound

• mixture