Unit 1 Review

Vocabulary

100

What is the definition of an element?

A. A pure substance that cannot be broken down into other substances

B. The basic unit of an element

C. A group of two or more atoms that are chemically bonded

A. A pure substance that cannot be broken down into other substances.

200

What is the definition of a Compound?

A. Letters used to represent each element

B. A group of two or more atoms chemically bonded together

C. A group of two or more different atoms chemically bonded together

C. A group of two or more different atoms chemically bonded together

300

What is the definition of a Chemical Formula?

A. Letter(s) used to represent an element

B. A group of letters and numbers that represents a molecule of a compound

C. A pure substance that cannot be broken down into smaller substances

B. A group of letters and numbers that represents a molecule of a compound

400

What is the definition of a Molecule?

A group of two or more atoms that are chemically bonded together

500

The basic unit of a chemical element

A. Element

B. Molecule

C. Atom

C. Atom

Counting Atoms

100

How many atoms are in this Chemical Formula?

O₂

2

200

How many atoms are in this Chemical Formula?

H₂O

3

300

How many atoms are in this Chemical Formula?

4AgNO₃

20

400

How many atoms are in this Chemical Formula

Ni₂(H₃Na₂)₂

12

500

How many atoms are in this Chemical Formula?

2Pb(N₂HO₃)₂

24

Compounds, Molecules, and Elements

100

Is this an Element, Compound, and/or Molecule?

Au

Element

200

Is this an Element, Compound, and/or Molecule?

N₂

Element and Molecule

300

Is this an Element, Compound, and/or Molecule?

NaCl

Compound and Molecule

400

True or False: Compounds are NEVER Molecules

False

Compounds are ALWAYS Molecules

500

Is this an Element, Compound, and/or Molecule?

H₂

Element and Molecule

Periodic Table

100

What is the definition of the Periodic Table?

A. The basic unit of an element

B. A table in which all the known elements are arranged by properties

C. A table in which all the know compounds are arranged by properties

B. A table in which all the known elements are arranged by properties

200

Name at least THREE different categories of the Periodic Table

Acceptable Answers: 

Metals, Nonmetals, Metalloids, Alkali Metals, Transition Metals, Noble Gases, Alkaline Earth Metals, Halogens, Lanthanides, and/or Actinides

300

What is a Chemical Symbol?

A. A pure substance that cannot be broken down into smaller substances

B. A whole number written in front of a Chemical Formula that indicates the of molecules

C. Letter(s) used to represent each element

C. Letter(s) used to represent each element

400

Are compounds listed on the Periodic Table?

No

Only Elements are present on the Periodic Table

500

How many elements are listed on the Periodic Table

118

Wild Card

100

Identify each Element in C₆H₁₂O₆

Carbon, Hydrogen, Oxygen

200

H₂O₂ is the Chemical Formula for Hydrogen Peroxide. How would I accurately represent 3 molecules of Hydrogen Peroxide?

A. 3H₂O₂

B. 3H₂3O₂

C. ³H₂O₂

A. 3H₂O₂

300

The Chemical Formula for Baking Soda is NaHCO₃. Which of these Elements does Baking Soda contain?

A. Nitrogen

B. Sodium

C. Krypton

D. Aluminum

B. Sodium

400

What is one thing these Compounds have in common:

C₃H₈O

C₄H₁₀O

C₅H₁₂O

They all contain Carbon, Hydrogen, and Oxygen

They are all Molecules

They all have Subscripts that are more than 2

500

Explain how to find the number of atoms of each element in the chemical formula Fe₂(SO₄)₃

You would begin by underlining your Capital Letters.

Next, you would find the amount of Atoms in each Element

Then you would multiply every subscript within the parenthesis by 3

After multiplying, you add all your subscripts to find the number of atoms in the Chemical Formula.

Total number: 17