Counting Atoms

Counting Atoms

No one told me math would be involved!

Learning Objectives

• We will recognize that chemical formulas are used to identify substances.

• We will recognize that chemical formulas determine the number of atoms of each element in chemical formulas containing subscripts.

Multiple Choice

What is an element?

• Earth, Wind, & Fire

• A part or aspect of something abstract, especially one that is essential or characteristic.

• Each of the 118 substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter.

• A part in an electric teapot, heater, or stove that contains a wire through which an electric current is passed to provide heat.

Open Ended

What is a compound?

Multiple Choice

How many elements are there: C₆H₁₂O₆

• 3

• 6

• 12

• 24

Multiple Choice

Is this an element or a compound: C₄

• Element

• Compound

Multiple Choice

Is this an element or a compound: CO₂

• Element

• Compound

Multiple Choice

Is this an element or compound: Na₂O

• Element

• Compound

Fill in the Blanks

How many elements are there: AgCO₃

Fill in the Blanks

How many elements are there: K₂HPO₄

Open Ended

What is a subscript?

Open Ended

How do you count atoms in a chemical formula?

Open Ended

What is a coefficient?

Multiple Choice

How many atoms are there: C₆H₁₂O₆

• 3

• 6

• 12

• 24

Multiple Choice

How many atoms are there: N₂O

• 2

• 3

• 4

Fill in the Blanks

How many atoms are there: H₂SO₄

Multiple Choice

How many atoms are there: (NH₄)₂SO₄

• 2

• 4

• 8

• 15

Multiple Choice

How many atoms are there: 2PO₄

• 2

• 4

• 8

• 10

Fill in the Blanks

How many atoms are there: NaCl

Fill in the Blanks

How many elements are there: CaOH₂

Fill in the Blanks

How many elements are there: O₂

Fill in the Blanks

How many atoms are there: 3(H₂CO₃)

Poll

Did you like this activity?

• Yes

• No

Open Ended

What can I do to make this activity better?

Open Ended

Do you have any questions? (Don't forget to post them and answers them in your Jamboard!)