Elements and Compounds

Which of the following represents an element?

• H₂O

• NaCl

• H₂

• CaCO₃

Which of the following is NOT a compound?

• OH

• NaCl

• Cl

• CO₂

Salt has a chemical formula of NaCl. Salt is a...

• Compound

• Mixture

• Element

• None of the Above

What cannot be broken down into other substances?

• Compound

• Solids

• Mixture

• Element

What is made up two or more elements that are chemically combined?

• Element

• Compound

• Mixture

• Solids

How many elements are represented in the compound?

Na₂CO₃

• 1

• 2

• 3

• 4

A combination of substances that are not chemically combined is called a(n)____________.

• mixture

• compound

• element

• metal

An element is made up of only one kind of _____.

• isotope

• atom

• plastic

• metal

What is H₂SO₄

made up of?

• 2 hydrogen, 1 sulfur, 4 oxygen

• 2 hydrogen & 4 sodium

• 1 hydrogen, 2 sulfur, 4 oxygen

• 1 hydrogen & 6 sodium

How many atoms are there TOTAL in:

H₂SO₄

• 3

• 5

• 6

• 7