COUNTING ATOMS

COUNTING

ATOMS

1

2

3

4

5

6

Multiple Choice

A chemical ______________ represents a substance.

• formula

• equation

• subscript

• mixture

Multiple Choice

A chemical formula represents a ________.

• molecule

• atom

Multiple Choice

Fe is the _________.

• atomic number

• element name

• atomic symbol

Multiple Choice

H is the chemical symbol for which element?

• Helium
• Hydrogen
• Mercury

Multiple Choice

C is the chemical symbol for which element? 

• Calcium
• Chlorine
• Carbon

Multiple Choice

O is the chemical symbol for which element? 

• Osmium
• Odell
• Oxygen

Multiple Choice

How many atoms of Hydrogen are in H₂O

• 1

• 2

• 3

• more than 3

Multiple Choice

The ______ are numbers found on the lower right-hand side of an element symbol.

• Coefficient

• Exponent

• Multiplier

• Subscript

Multiple Choice

The blue numbers in the image below represent ________

• element symbol

• coefficients

• subscripts

• yield

Multiple Choice

Coefficients in chemical formulas...

• Multiply just the first atom

• Add to the subscripts at the end of the molecule

• Multiply elements without subscripts

• Multiply EVERYTHING!

Multiple Choice

A ______ is a number written in front of a chemical formula.

• Coefficient

• Subscript

• Exponent

• Coordinator

Multiple Choice

How many Hydrogen atoms are in 4H₂O?

• 6

• 8

• 2

• 4

Multiple Choice

How many Sodium atoms are in 6NaCl?

• 1

• 12

• 6

Multiple Choice

Coefficients tell the number of __________ in a formula.

• Molecules

• Atoms

• Elements

• Oxygen

Elements are represented by either ____ or
____ letter symbols. The first letter of an
element is always a _______ letter and the

second letter will be _________.

Chemical Symbol

one

two

capital

lowercase

Multiple Choice

How many oxygens (O) are in Li₂SO₄?

• 1

• 2

• 3

• 4

Multiple Choice

How many atoms of Hydrogen are in H₂O

• 1

• 2

• 3

• more than 3

Multiple Choice

How many Hydrogen atoms are in 4H₂O?

• 6

• 8

• 2

• 4

Multiple Choice

What does the number 4 represent in 4NH₃?

• Subscript

• Superscript

• Coefficient

Multiple Choice

How many atoms of Hydrogen are in this compound?

• 1

• 2

• 3

• 4

Multiple Choice

The number written after an element’s symbol in a chemical formula that indicates the number of atoms of a specific element.

• coefficient

• subscript

Multiple Choice

The number in front of an element or compound that indicates the number of molecules in a chemical formula.

• coefficient

• subscript

Multiple Choice

A pure substance that cannot be broken down into simpler substance by a chemical reaction.

• compound

• element

• solid

• liquid

Multiple Choice

The one or two letter representation of an element. Symbols are often derived from the Latin name of the element

• atomic number

• element symbol

• element name

• atomic mass

Multiple Choice

 2H₂O
How many Hydrogen atoms are present?

• 2
• 4
• 1
• 10

Multiple Choice

2H₂O
How many Oxygen atoms are present?

• 2
• 4
• 1
• 5

Multiple Choice

2H₂O
How many H₂O molecules are present?

• 1
• 4
• 2
• 8

THE END

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