Understanding Matter Review

Understanding Matter Review & Counting Atoms

Chemical formulas use Coefficients and subscripts to tell how many of each element is in the compound or molecule.

Is only one type of atom that has its own properties found on the periodic table of elements

​Element

atoms of two or more different elements are bonded together

​Compound

Vocabulary

A molecule is a group of two or more atoms held together by attractive forces known as chemical bonds that make up a substance with definite physical and chemical properties.

​Molecule

General term for the smallest part of matter that make everything. Matter is defined as anything that has mass and takes up space.

​Atom

Vocabulary

Is only one type of atom that has its own properties found on the periodic table of elements

​​element

​Replace this with your body text. Have a nice day. Happy teaching!

​​compound

A molecule is a group of two or more atoms held together by attractive forces known as chemical bonds that make up a substance with definite physical and chemical properties.

​​molecule

​the smallest particle of matter with three subatomic particles.

​Atom

a group of element symbols and numbers that represent a substance or compound.

​Chemical formula

One or two letters found on the periodic table of elements to represent an element

​Element Symbol

Vocabulary

a small number placed after the element to show the number of that element in the compound

​Subscript

a number placed in front of an element symbol or chemical formula in an equation

​Coefficient

Vocabulary

Multiple Choice

How many atoms are in H₂O.

• 2

• 3

• 1

• 4

Multiple Choice

How many elements are in H₂O?

• 2

• 3

• 4

• 1

Multiple Choice

How many molecules of water is in this equation?

5 H₂O

• 10

• 3

• 15

• 5

Multiple Choice

How many oxygen atoms are in this equation?

5 H₂O

• 10

• 3

• 15

• 5

Multiple Choice

How many hydrogen atoms are in this equation?

5 H₂O

• 10

• 3

• 15

• 5

Subscripts are the small numbers that tell how many atoms of that element is in that compound. Add the subscripts of each element. Then multiply by the coefficient to get the number of that element.

​

​Counting atoms

Draw

Draw what the compound CH₄ would look like.

Open Ended

How would you write 3 compounds of baking soda?

Multiple Choice

How many hydrogen atoms would I have if there was a coefficient of 2 vinegars?

• 4

• 2

• 8

• 6