chemistry - review package 3 (version b)

8/9/2019 Chemistry - Review Package 3 (Version B)

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SCIENCE 9 Chemistry Test Review

Things to Study

1) Review Text Book

2) Review all handouts and notes on

PART A: VOCABULARY

The following are key words. Define the bolded terms

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REVIEW: CHEMISTRY TEST 3

Molecules Elements Compounds

Ionic Bonds Covalent Bonds Valence Shell

Valence Electrons Periodic Table Atoms

Metals Non-Metals Chemical Staircase

Combining Capacity Atomic Number Atomic Mass

Atoms Ozone Chemical Bonds

Electrons Protons NeutronsMolecular Compound Metalloids Ionic Compound

Noble Gases Halogens Alkai Metals

Atomic Radius Anion Cation

TEST DATE: _________________




PART B: SHORT ANSWER

1. ELEMENTS & COMPOUNDS

a. In your own words, explain the difference between an element and a

compound.

b. What is a diatomic molecule? Is a diatomic molecule an element or

compound?

c. Complete the table below

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CHEMICAL

FORMULAELEMENT OR COMPOUND

NAME OF ELEMENTS &

NUMBER OF ATOMS

H2O COMPOUND 2 – hydrogen 1 - oxygen

SO2

N2

3 CaO

4 Mg3N2

Ne

2 O2

H2




2. COMPOUNDS

a. Complete the diagram below using the word bank.

b. Vinegar is a great product to have in your kitchen. Vinegar is made of 4

Hydrogen Atoms, 2 Carbon Atoms, and 2 Oxygen Atoms.

What is the chemical formula of Vinegar?

c. Mr. Bregar has the following chemical formula:

3 Mg3(PO4)2

How many Magnesium atoms are there: ________________

How many Oxygen atoms are there: ________________

How many Phosphorous atoms are there: ________________

How many Total atoms are there: ________________

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Chemical Symbol Coefficient Subscript




d. Based on what you know about valence electrons, explain why noble

gases are totally unreactive.

e. Chemical Bonds

i. In your own words, explain the difference between an ionic

bond and a covalent bond.

ii. Would a water molecule, H2O contain ionic or covalent bonds?

Explain your answer.

f. Answer the following below

i. Refer to the atomic diagram of a Neon atom. Will this neon

atom gain electrons, lose electrons, or remain as it is. Explain

your answer.

ii. Refer to the atomic diagram of a Boron atom. Will this Boron

atom gain electrons, lose electrons, or remain as it is. Explain

your answer.

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g. Complete the table below

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ATOMS INVOLVED

METAL NON-METALCHEMICAL

FORMULANAMEChemical

Symbol

Combing

Capacity

Chemical

Symbol

Combing

Capacity

Sodium and Fluorine Na 1 F 1 NaF Sodium Fluoride

Nitrogen and Beryllium Be 2 N 3 Be3N2 Beryllium Nitride

Aluminum and Sulfur

Aluminum and Fluorine

Bromine and Calcium

Oxygen and Sodium

Lithium and Chlorine

Neon




3. Periodic Table and Ions

Draw the following Bohr Diagrams of the following atoms:

Draw the following Bohr Diagrams of the following IONS:

DO NOT FORGET YOUR SQUARE BRACKETS & CHARGES

From your diagram above, identify those ions which are cations and those ions

which are anions.

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SODIUM ATOM MAGNESIUM ATOM NITROGEN ATOM OXYGEN ATOM

# of Protons ______

# of Electrons ______

# of Neutrons ______

# of Protons ______



# of Protons ______



# of Protons ______



SODIUM ION MAGNESIUM ION NITROGEN ION OXYGEN ION

# of Protons ______



# of Protons ______



# of Protons ______



# of Protons ______






4. STRUCTURAL MODELS

Models for molecules can be the ball-and-stick models that you built in class

or they can be drawings on paper. Each type of model is useful.

The combining capacities for some elements are given below.

Use the information provided to draw structural diagrams for the moleculesbelow. You might find a double or triple bond in some of these molecules.

a. Water, H2O

b. Oxygen, O2

c. Carbon Dioxide, CO2

d. Ethane, C2H6

e. CH3CH2COOH

f. Formic Acid, HCOOH

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Element Number of Bonds

Hydrogen 1

Oxygen 2

Nitrogen 3

Carbon 4




5. STRUCTURAL MODELS

Use Bohr Diagrams to illustrate the formation of the following ionic

compounds and molecular compounds.

Remember ionic bonds involve the loss and gaining of electrons.Molecular

compounds involve the sharing of electrons to attain a full valence shell.

Hint – See the animation on Lesson 15.

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NaF

H2

O2




6. ATOMIC MODELS & THE PERIODIC TABLE

a. Complete the table below.

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PERIOD GROUPCHEMICAL

SYMBOLNAME

ATOMIC

NUMBER

METAL

OR

NON-METALTYPE OF ION

FORMED

4 2 Ca Calcium 20 Metal Cation

Chlorine

2 15

P

18 Kr

Oxygen

Li2O




b. Elements 9 and 17 are in the same chemical family. Draw bohr

diagrams for both these atoms. How many electrons are in the last

shell of these elements?

c. Complete the table below. How many valence electrons would you

expect for atoms in the following groups.

d. What are the common properties of metals?

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CHEMICAL FAMILY VALENCE ELECTRONS COMBINING CAPACITY

Group 1

Group 2

Group 13

Group 14

Group 15

Group 16

Group 17

Group 18




e. What are the common properties of non-metals?

f. What are Alkali metals? Why are Alkali metals highly reactive?

Answer based on what you about their electronic structure.

g. Why are the noble gases totally unreactive. Answer based on what

you know about their electronic structure.

h. What are Halogens? Why are the Halogens highly reactive? Answer

based on what you know about their electronic structure.

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chemistry - review package 3 (version b)

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