Elements and Compounds

Which of the following represents an element (elemental molecule)?

• H₂O

• H₂

• NaCl

• CaCO₃

Which of the following is not a compound?

• HCl
• Cl
• NaCl
• CO2

Tags

NGSS.MS-PS1-1

Is sugar (C₁₂H₂₂O₁₁) an element or a compound?

• Element
• Compound

Tags

NGSS.MS-PS1-1

A compound consists of two or more DIFFERENT elements bound together.

• True

• False

Is Iron (Fe) an element or a compound?

• Element
• Compound

Tags

NGSS.MS-PS1-1

How many different elements are in this chemical formula: C₂H₂ClK₃

• 6
• 8
• 2
• 4

Tags

NGSS.MS-PS1-1

Which of the following atomic symbols is written correctly?

• ee
• hE
• C
• CL

Tags

NGSS.MS-PS1-1

Can be found on the periodic table

• Elements

• Compounds

• Mixtures

These contain only one kind of atom. 

• element 
• compound 
• mixture 
• water 

Tags

NGSS.MS-PS1-1

Elements can be broken down into simpler substances. 

• false 
• true 
• sometimes 

Tags

NGSS.MS-PS1-5