Grade 7 - Elements and Compounds

Carbon is considered an element, while carbon dioxide is considered a compound. This is because carbon dioxide is ---

• a gas at room temperature.

• made of two different elements.

• given off by green plants.

• useful to human beings

Tags

NGSS.MS-PS1-1

What is the Chemical Symbol for Magnesium?

• 12

• Magnesium

• 24.31

• Mg

Compounds are different than elements because compounds are ---

• combinations of two or more elements.

• not able to be broken down into parts.

• made from the same type of atoms.

• a pure substance; elements are not.

Tags

NGSS.MS-PS1-1

The smallest particle of any particular type of matter is known by which of the following terms?

• Element

• Chemical

• Atom

• Compound

Tags

NGSS.MS-PS1-1

Is sugar (C₁₂H₂₂O₁₁) an element or a compound?

• Element
• Compound

Tags

NGSS.MS-PS1-1

Is Iron (Fe) an element or a compound?

• Element
• Compound

Tags

NGSS.MS-PS1-1

Which of the following represents an element?

• H₂O
• H₂
• NaCl
• CaCO₃

Tags

NGSS.MS-PS1-1

How many elements are represented in the compound?
Na₂CO₃

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

How many elements are represented in the compound?
Na₂CO₃

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

The chemical symbol of an element always matches the element's name.

• Agree

• Disagree