Elements and Compounds

Which of the following represents an element?

• H₂O

• NaCl

• H₂

• CaCO₃

Which of the following is not a compound?

• HCl

• NaCl

• Cl

• CO₂

Tags

NGSS.MS-PS1-1

What cannot be broken down into other substances?

• Compound

• Solids

• Mixture

• Element

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

• Compound

• Mixture

• Element

• None of the Above

Tags

NGSS.MS-PS1-1

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

Tags

NGSS.MS-PS1-1

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

• mixture

• compound

• element

• metal

Which statement best describes an element?

• pure, made of more than one type of atom

• when combined, a chemical reaction forms

• pure, made of only one type of atom

• can be broken down easily

The smallest particle of matter that makes up an element and a compound?

• Element

• Chemical

• Atom

• Substance

Tags

NGSS.MS-PS1-1

Which one can be found on the periodic table?

• Compound 
• Element