CBA 1 Review 25-26

How many elements are found in the chemical formula CO₂, _______

• 2

• 1

• 3

• 4

Tags

NGSS.MS-PS1-1

How many atoms are in the chemical formula O₂, _______

• 2

• 1

• 3

• 4

Tags

NGSS.MS-PS1-1

How many atoms are in the chemical formula C₁₂H₂₂O₁₁, _______

• 45

• 23

• 35

• 52

Tags

NGSS.MS-PS1-1

How many elements are in: C₁₂H₂₂O₁₁,

• 3

• 2

• 4

• 1

Tags

NGSS.MS-PS1-1

For the formula F₂, fill in the number of elements: _______

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

How many atoms are in H₂O₂

• 4

• 2

• 3

• 5

Tags

NGSS.MS-PS1-1

For the formula C₃H₈, fill in the number of atoms: _______

• 11

• 8

• 10

• 12

Tags

NGSS.MS-PS1-1

Which of the following is an example of a compound?

• helium (He)

• sodium (Na)

• carbon dioxide (CO₂)

• iron (Fe)

Tags

NGSS.MS-PS1-1

Which statement about molecules is true?

• Molecules are always composed of only one type of atom.

• Molecules are the smallest unit of an element that keeps its chemical properties.

• Molecules are formed by atoms bonding together.

• Molecules cannot be represented by chemical formulas.

Tags

NGSS.MS-PS1-1

What does the chemical formula H₂O represent?

• a molecule of oxygen gas

• a compound consisting of two hydrogen atoms and one oxygen atom

• a mixture of hydrogen and oxygen

• a single atom of water

Tags

NGSS.MS-PS1-1