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Gen Chem Semester 1 Review

Total questions: 65

Worksheet time: 1hrs 6mins

Name
Class
Date
1.

What does the Shell Model of the atom say? (Choose the best option).

a)

Atoms have electron clouds and a nucleus

b)

Atoms have nuclei made of protons and neutrons, while electrons exist in shells around the nucleus

c)

Atoms have nuclei made of protons and electrons while the neutrons exist in the electron cloud

d)

Atoms have protons, neutrons, and electrons

2.

What's the difference between a physical property and a chemical one?

a)

Physical properties include flammability and reactivity. Chemical properties include color and length.

b)

Chemical properties include boiling and melting points. Physical properties include color and length.

c)

Physical properties do not change the ID of the substance, like melting or boiling point. Chemical properties do change the ID of the substance, like flammability or reactivity.

d)

Chemical properties do not change the ID of the substance, like melting or boiling point. Physical properties do change the ID of the substance, like flammability or reactivity.

3.

Which type of bond is made up of electrons that were stolen or given away?

a)

Ionic

b)

Covalent

c)

Metallic

d)

Homogeneous

e)

Heterogeneous

4.

What ion will the element Sulfur make?

a)

+2

b)

+6

c)

-6

d)

-2

5.

How is the periodic table arranged?

a)

The columns are called Families or Groups. The rows are called Periods. Elements are arranged according to atomic number.

b)

The columns are called Families or Groups. The rows are called Periods. Elements are arranged according to atomic mass.

c)

The rows are called Families or Groups. The columns are called Periods. Elements are arranged according to reactivity.

d)

The rows are called Families or Groups. The columns are called Periods. Elements are arranged according to valence electrons.

6.

What is the atomic number of Fluorine?

a)

9

b)

18.998

c)

17

d)

7

7.

Melting and Burning are very similar properties. Are they chemical or physical properties?

a)

Melting is chemical and burning is physical.

b)

They're both chemical

c)

Burning is chemical and melting is physical

d)

They're both physical

8.

How many electrons fill the first 3 shells of an atom?

a)

2, 8, 8

b)

8, 8, 8

c)

2, 8, 18

d)

2, 2, 2

9.

You have two unknown white substances. You know one is an ionic compound and the other is covalent. What tests could you do to determine which is which? (Choose all that apply)

a)

Try melting them - ionic compounds have higher melting points than covalent

b)

Look at them under a microscope - covalent compounds usually form crystal lattices.

c)

Try burning them - covalent compounds usually change the color of the flame

d)

Try dissolving them - ionic compounds usually dissolve better than covalent

10.

Why are valence electrons so important?

a)

Valence electrons are the closest to the nucleus

b)

Valence electrons are the only electrons involved in bonding

c)

Valence electrons are the only electrons not involved in bonding

d)

Valence electrons make an atom radioactive

11.

Why do elements bond?

a)

To become stable - to get 8 valence electrons

b)

To become stable - to get 10 valence electrons

c)

To become unstable - to use less energy

d)

To become unstable - to use more energy

12.

If mercury melts at -39oC and boils at 357oC, what state of matter is it at room temperature? (Room temperature is 25oC).

a)

Solid

b)

Liquid

c)

Gas

d)

Plasma

13.

True or False: Elements that have the same number of valence electrons will react in the same way.

a)

True

b)

False

14.

What are the reactants in the following equation:


HCl + NaOH --> H2O + NaCl

a)

HCl and H2O

b)

NaOH and NaCl

c)

HCl and NaOH

d)

H2O and NaCl

15.

What compound is formed when Calcium bonds with Phosphorus?

a)

CaP

b)

CaP2

c)

Ca3P

d)

Ca3P2

16.

What is the name of the compound N2H4 ?

a)

Dinitrogen Tetrahydride

b)

Nitrogen Hydride

c)

Nitrogen Trihydride

d)

Binitrogen Quadrahydride

17.

How many protons, neutrons, and electrons are in a neutral nitrogen atom?

a)

7 protons, 14 neutrons, 7 electrons

b)

7 protons, 7 neutrons, 7 electrons

c)

14 protons, 7 neutrons, 7 electrons

d)

7 protons, 7 neutrons, 14 electrons

18.

How many shells does the element Cl have?

a)

17

b)

35

c)

3

d)

7

e)

8

19.

Which family of elements is made up of nonmetal, highly reactive elements?

a)

Family 1 - Alkali Metals

b)

Family 2 - Alkaline Earth Metals

c)

Families 3-12 - Transition Metals

d)

Family 17 - Halogens

e)

Family 18 - Noble Gases

20.

You have a mixture made up of some liquids and some solids. What's the best way to separate the liquids from the solids?

a)
b)
c)
d)
21.

A student finds an ionic compound but they don't know what the metal in it is! They do know that it bonds with oxygen like this: X2O. What is the charge of X?

a)

+1

b)

-1

c)

+2

d)

-2

22.

Kennedy is separating a mixture. She filtrates the mixture first to separate the liquids from the solids. If she sets the liquids on fire, to separate the rest, did she use chemical or physical properties?

a)

Filtration is chemical, burning is physical

b)

They're both physical

c)

Burning is chemical, Filtration is physical

d)

They're both chemica

23.

Which element below would bond with nitrogen like this: X3N2

a)

Lithium

b)

Sodium

c)

Calcium

d)

Aluminum

24.
What type of bond results from shared electrons?
a)
Covalent Bond
b)
Ionic Bond
c)
Hydrogen Bond
d)
Water Bond
25.
What is an ion?
a)
 A small atom
b)
A large atom
c)
A neutral atom
d)
A charged atom
26.
Which subatomic particle is positive?
a)
Electron
b)
Proton
c)
Neutron
d)
Quark
27.
Which subatomic particle is negative?
a)
Proton
b)
Neutron
c)
Electron
d)
Negatron
28.
What two subatomic particles are found in the nucleus?
a)
Protons and Electrons
b)
Neutrons and Electrons
c)
Protons and Neutrons
d)
Electrons only
29.
Atoms of the same element that have different masses are called
a)
moles
b)
isotopes
c)
nuclides
d)
neutrons
30.
the central region of an atom where its neutrons and protons are is its 
a)
nucleus 
b)
electron cloud
c)
core 
d)
center 
31.
A(n) _____ is a unique substance that forms when two or more elements combine chemically.
a)
element
b)
compound
c)
mixture
d)
all of the above
32.
The substances on the right side of the yields arrow that are produced in a chemical reaction are called _____.
a)
reactants
b)
products
c)
reactors
d)
ingredients
33.
The substances on the left of the yields arrow that start a chemical reaction are called _____.
a)
reactants
b)
products
c)
reactors
d)
ingredients
34.
The outermost set of electrons around an atom are called:
a)
Electronegativity
b)
Quantum Number
c)
Valence Electrons
d)
Oxidation Number
35.
What kind of energy is represented in the picture?
a)
Thermal
b)
Chemical
c)
Sound
d)
Nuclear
36.
Anything that takes up space and has mass is known as _______________.
a)
Matter
b)
Molecules
c)
Compounds
d)
Stuff
37.
What are the building blocks of MATTER?
a)
Atoms
b)
Cells
c)
Protons
d)
Neutrons
38.
A(n) ____________________ is a pure substance made of a single type of atom and cannot be broken down.
a)
Element
b)
Compound
c)
Molecule
d)
Mixture
39.
Burning a piece of paper 
a)
Chemical Change 
b)
Physical Change 
40.
Mixing salt and water 
a)
Chemical Change 
b)
Physical Change 
41.

An electron is located ...

a)

in the nucleus.

b)

outside the nucleus.

42.
If an atom receives an electron, what is the charge of that atom?
a)
1+
b)
1-
c)
2+
d)
2-
43.
At higher temperatures
a)
particles in an object have less energy
b)
particles in an object move faster
c)
a gas contracts
44.
How many ATOMS are in the following compound:  C2H4O2
a)
3
b)
8
c)
1
d)
6
45.
If an atom gives away an electron, will it become positive or negative?
a)
positive
b)
negative
46.
What is the atomic number of the element in the picture?
a)
39.0983
b)
19
47.
Isotopes have different numbers of
a)
protons
b)
neutrons
c)
electron
d)
properties
48.
How are ionic bonds formed?
a)
When atoms share an electron
b)
When electrons are transferred.
c)
When one atom takes a proton
d)
When one atom takes a neutron
49.
Which of these are not elements?
a)
Carbon
b)
Oxygen
c)
Water
d)
Hydrogen
50.
Atoms will react in ways that allow them to obtain 8 electrons in their highest shell.
a)
Octet Rule
b)
Electron Shell Completion Rule
c)
2(n2)
51.
What is the atomic number for carbon?
a)
3
b)
5
c)
6
d)
7
52.

What is the correct formula for phosphorous trichloride?

a)

PCl3

b)

P3Cl

c)

P3Cl3

d)

PCL

53.

What is the correct name for CCl4?

a)

carbon tetrachloride

b)

monocarbon tetrachloride

c)

tetracarbon monochloride

d)

carbon chloride

54.

What is the correct name of the compound HgCl2?

a)

mercury (II) chloride

b)

mercury chlorite

c)

Monomercury dichloride

55.
Which of these is covalent?
a)
NaCl
b)
Pb(NO3)2
c)
CO2
d)
AlCl3
56.
K +  and  N-3
a)
KN
b)
KN3
c)
K3N3
d)
K3N
57.
Bromine monoflouride
a)
Br1F1
b)
BrF
c)
Br2F
d)
BrF2
58.

Ionic or covalent?

NaF

a)

Ionic

b)

Covalent

59.
Which of these compounds is ionic? 
a)
Carbon dioxide
b)
Dinitrogen trioxide
c)
Silicon tetrachloride
d)
Lithium bromide
60.

Name Al2S3

a)

aluminum sulfide

b)

dialuminum trisulfide

c)

ammonium sulfide

d)

aluminum (II) sulfite

61.

Select the correct formula for sulfur hexachloride

a)

S2Cl6

b)

S6Cl

c)

SCl6

d)

SF6

62.
What atom matches this electron configuration?
1s2 2s2 2p6 3s2
a)
Neon
b)
Magnesium
c)
Aluminum
d)
Potassium
63.
How many electrons can the first energy level hold?
a)
1
b)
2
c)
8
d)
0
64.
Which electron configuration belongs to Chlorine (Cl)?
a)
1s2 2s2 2p6 3s2 3p5
b)
1s2 2s2 2p6 3s2 3p6
c)
1s2 2s2 2p6 3s2 3p7
65.

The second shell from the center of an atom can hold how many electrons?

a)

2

b)

6

c)

8

d)

18

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