Counting Atoms

Multiple Choice

Elements

• are made of two or more types of atoms chemically bonded together

• are made of one type of atom

• are made of two or more types of molecules combined in the same space

• are always individual atoms

Multiple Choice

How many different ELEMENTS are in C₆H₁₂O₆?

• 1

• 2

• 3

• 6

Multiple Choice

A group of chemical symbols and numbers that represent the elements and the numbers of atoms of each element in a compound is

• a chemical formula.

• an ionic bond.

• a heterogeneous mixture.

• a homogeneous mixture.

Multiple Choice

A number in front of a chemical formula in an equation that indicates how many molecules are in that compound.

• Superscript

• Subscript

• Coefficient

• Parenthesis

Multiple Choice

A substance made up of atoms of two or more different elements joined by chemical bonds.

• Element

• Compound

• Molecule

• Mixture

Multiple Choice

How many molecules of table salt are there in 6NaCl?

• 1

• 12

• 6

• 3

Multiple Choice

How many atoms of Oxygen are there in: H₂SO₄

• 6

• 5

• 4

• 2

Multiple Choice

If there is no subscript, there is/are ______ atom(s) of that element.

• 0

• 2

• only 1

• 1 million

Multiple Choice

How many TOTAL atoms are there in H₂O (water)?

• 1

• 2

• 3

• more than 3

Multiple Choice

A tall number in front of a chemical formula. It indicates the number of molecules present.

• Coefficient

• Subscript

• Exponent

• Coordinator

Multiple Choice

What does the subscript in a chemical formula tell you?

• How many molecules are present

• How many atoms are present

• How many elements are present

• How many neutrons are present

Multiple Choice

How many different ELEMENTS are in N₂O ?

• 1

• 2

• 3

• 4

Multiple Choice

What is the correct chemical formula for the compound pictured?

• H₂

• H₂O

• O₂

• H₂O₂

Multiple Choice

How many total atoms make up glucose, C₆H₁₂O₆?

• 3

• 6

• 12

• 24

Multiple Choice

How many atoms of oxygen (O) are in 2 molecules of K₂SO₄?

• 1

• 2

• 4

• 8

Multiple Choice

How many atoms of Iron are in this compound?

• 1

• 2

• 3

• 4

Multiple Choice

C₃H₅(NO₃)₃

• C = 3, H = 5, N = 3, O = 9

• C = 3, H = 5, N = 1, O = 9

• C = 9, H = 15, N = 3, O = 9

• C = 9, H = 15, N = 1, O = 3

Multiple Choice

H₂SO₄

• H = 2, S = 4, O = 4

• H = 2, S = 1, O = 4

• H = 8, S = 4, O = 4

• H = 2, SO = 4

Multiple Choice

How many Hydrogen are in 4H₂O?

• 6

• 8

• 2

• 4

Multiple Choice

How many Magnesium are in 10MgCl₂?

• 10

• 5

• 20

Multiple Choice

How many O's are in Al₂(SO₄)₃

• 4

• 12

• 7

• 24

Multiple Select

Which of the following are examples of ELEMENTS?

• Oxygen

• Water

• F₂

• Lemonade

• Sulfur Dioxide (SO₂)

Multiple Choice

Salt (NaCl)

• Compound

• Element

• Mixture

Multiple Choice

$$What\ is\ the\ TOTAL\ number\ of\ atoms\ in\ 4AgNO_3?$$

• 4

• 5

• 12

• 20

Multiple Choice

$$What\ is\ the\ total\ number\ of\ atoms\ in\ Pb(OH)_2?$$

• 2

• 3

• 5

• 6

Multiple Choice

$$How\ many\ ELEMENTS\ are\ in\ 3NH_4Br?\ Hint:\ \ I'm\ not\ asking\ how\ many\ atoms.$$

• 3

• 14

• 12

• 1