Elements and Compounds

What is H₂SO₄  made up of?

• 2 hydrogen, 1 sulfur, 4 oxygen

• 1 hydrogen, 2 sulfur, 4 oxygen

• 2 hydrogen & 4 sodium

• 1 hydrogen & 6 sodium

Tags

NGSS.MS-PS1-1

How many elements are represented in the compound?
Na₂CO₃

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

When two or more elements chemically combine

• element

• compound

• mixture

• solution

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which statement best describes an element?

• made from mixture 

• thousands in the world

• pure, made of only one atom

• can be separated 

Which of the following chemical formulas represents a compound? 

• C₃

• O₂

• CH₃CHO

• H₂

Tags

NGSS.MS-PS1-1

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.

Tags

NGSS.MS-PS1-1

Both elements and compounds are pure substances.

• Agree

• Disagree

Compounds have properties different from the elements that make it up.

• Agree

• Disagree

Tags

NGSS.MS-PS1-5

Represented by an unique chemical symbol

• Elements

• Compounds

• Both

Located on the Periodic Table

• Elements

• Compounds

• Both