Oxygen forms molecules made of two atoms, O 2. Carbon and oxygen form molecules made of one carbon atom and two oxygen atoms, CO 2 . Which of the statements below is true?

O 2 is a molecule and CO 2 is a compound

Both O 2 and CO 2 are compounds

Both O 2 and CO 2 are molecules

O 2 is a compound and CO 2 is a molecule

Which statement comparing the relationship between elements and compounds to molecules is true?

A molecule is composed of two or more atoms of the same element (like O 2 ), or atoms of more than one different elements (like all compounds)

A molecule is only composed of two or more different elements (like all compounds), but two atoms of the same element cannot form a molecule

A molecule is the simplest form of matter and is the building block of both elements and compounds

A molecule is composed of two or more atoms of the same element (like O 2 ), but atoms of more than one type of element cannot form a molecule

U1Q1 Elements and Compounds

Authored by Angela Derden

Science

7th Grade

NGSS covered

Used 12+ times

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DROPDOWN QUESTION

1 min • 6 pts

Element or compound?
HCl (a)

compound

element

DROPDOWN QUESTION

1 min • 6 pts

Element or compound?
H₂O (a)

compound

element

Tags

NGSS.MS-PS1-1

DROPDOWN QUESTION

1 min • 6 pts

Element or compound?
H₂ (a)

element

compound

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NGSS.MS-PS1-1

DROPDOWN QUESTION

1 min • 6 pts

Element or compound?
Cl₂ (a)

element

compound

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NGSS.MS-PS1-1

DROPDOWN QUESTION

1 min • 6 pts

Element or compound?
Ag (a)

element

compound

DROPDOWN QUESTION

1 min • 6 pts

Element or compound?
(a)

element

compound

Tags

NGSS.MS-PS1-1

DROPDOWN QUESTION

1 min • 6 pts

Element or compound?
(a)

compound

element

Tags

NGSS.MS-PS1-1

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