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Chemistry Semester 1 Review

Total questions: 56

Worksheet time: 2hrs 52mins

Name
Class
Date
1.

The number of protons in an atom is known as the ____________ of that atom.

a)

atomic mass

b)

atomic number

2.

A(n) ___________ is an atom of the same element but with a different mass.

a)

ion

b)

isotope

c)

atom

d)

electron

3.

Ernest Rutherford discovered the ______________ by shooting alpha particles at thin piece of gold foil.

a)

electron

b)

plum pudding

c)

nucleus

d)

electron cloud

4.

A scientist named __________________ discovered the electron and thought that the atomic model looked something like 'plum pudding.'

a)

J.J Thomson

b)

Ernest Rutherford

c)

Niels Bohr

d)

Erwin Schrodinger

5.

Chlorine-35 has how many neutrons?

a)

18

b)

17

c)

16

d)

7

6.

Which family of elements does not form bonds?

a)

Halogens

b)

Alkaline Earth Metals

c)

Noble Gases

d)

Transition Metals

7.

The ______________________explains how atoms share electrons in covalent bonding.

a)

octet rule

b)

Aufbau Principle

c)

exclusion principle

d)

cell theory

8.

Ionic bonds are between ______________ and __________________.

a)

metals, metals

b)

non-metals, non-metals

c)

metals, non-metals

d)

molecules, transition metals

9.

Covalent bonds occur when electrons are _____________ between atoms.

a)

transferred

b)

shared

c)

destroyed

d)

formed

10.

Which of the following is NOT an example of an intensive property.

a)

mass

b)

color

c)

boiling point

d)

density

11.

Pure air is composed of nitrogen, oxygen, argon, carbon dioxide, methane, neon and other gases. Pure air would be considered as a(n)

a)

element

b)

compound

c)

homogenous mixture

d)

heterogeneous mixture

12.

The tendency of something to rust is what type of property?

a)

chemical

b)

extensive physical

c)

intensive physical

d)

not a property

13.

Which subatomic particle has a positive charge?

a)

Proton

b)

Neutron

c)

electron

d)

isotope

14.

Which of the following is an example of a heterogeneous mixture?

a)

carbon dioxide

b)

tea

c)

salad

d)

milk

15.

What can a homogeneous mixture also be called?

a)

solid

b)

crystallization

c)

solution

d)

liquid

16.

The complete electron configuration of tin is

a)

1s22s22p63s23p64s23d104p65s24d105d105p2

b)

1s22s22p63s23p64s23d104d104p2

c)

1s22s22p63s23p64s24p65s24d105d105p2

d)

1s22s22p63s23p64s23d104p65s24d105p2

17.

A ____________ ion is a group of atoms that have a charge and the group as a whole shares the charge.

a)

polyatomic

b)

cation

c)

anion

d)

onion

18.

Which of the following elements has a full outer energy level (8 valence electrons)?

a)

Na

b)

Mg

c)

O

d)

Xe

19.

A _____________ is a positively charged ion.

a)

polyatomic

b)

cation

c)

anion

d)

onion

20.

Germanium has ____________ in its 4p orbitals.

a)

one electron

b)

two electrons

c)

three electrons

d)

four electrons

21.

When naming ionic compounds, which element do you write first?

a)

element with the higher atomic number

b)

non-metal

c)

cation

d)

anion

22.

Melting point is what type of property?

a)

chemical

b)

intensive physical

c)

extensive physical

d)

not a property

23.

The electron configuration for the carbon atom is:

a)

1s²2s²2p²

b)

[He]2s4

c)

[Ne]2s²2p²

d)

1s²2p4

24.

All alkaline earths have the following number of valence electrons:

a)

1

b)

3

c)

6

d)

2

25.

Which element is an exception to the octet rule?

a)

Hydrogen

b)

Carbon

c)

Silicon

d)

Neon

26.

Which of the following molecules is tetrahedral in shape?

a)

OCl₂

b)

SF₂

c)

CCl4

d)

H₂S

27.

Which of the following changes could be an example of physical change?

a)

Ethanol combusting

b)

vinegar reacting with baking soda

c)

NaCl being ground into smaller crystals

d)

sodium reacting with water

28.

Which of the following electron configurations is correct?

a)

Ga: [Kr] 4s23d104p1

b)

Bi: [Xe]6s24f145d106p3

c)

Ca: [Ar]4s13d10

d)

Br: [Kr]4s23d1o4p7

29.

H₂O is what shape?

a)

linear

b)

trigonal planar

c)

tetrahedral

d)

bent

30.

1s22s22p63s23p64s23d2 is the correct electron configuration for which of the following atoms?

a)

Ca

b)

Ti

c)

Ge

d)

Zr

31.

Color of a substance is what type of property

a)

Chemical

b)

intensive physical

c)

extensive physical

d)

not a property

32.

CO₂ is what shape?

a)

linear

b)

trigonal planar

c)

tetrahedral

d)

bent

33.

What is the formula of lithium nitride?

a)

LiNO3

b)

LiN

c)

Li3N

d)

LiNO₂

34.

What shape is the molecule NCl3?

a)

pyramid

b)

bent

c)

trigonal planar

d)

tetrahedral

35.

What is the formula of Nitrogen dioxide?

a)

NO

b)

N2O

c)

NO2

d)

N2O2

36.

What is the formula for sodium oxide?

a)

NaO

b)

NaO2

c)

Na2O

d)

SO

37.

Frying an egg is an example of what type of change?

a)

Chemical

b)

Physical

c)

no change

38.

What is the formula of Manganese (IV) Bromide?

a)

MnBr4

b)

MgBr4

c)

Mn4Br

d)

MnBr

39.

How many neutrons does Silicon have?

a)

14

b)

28

c)

32

d)

16

40.

Breaking a stick in half is an example of what type of change?

a)

Chemical

b)

Physical

c)

no change

41.

What shape is the molecule OF2?

a)

pyramid

b)

bent

c)

trigonal planar

d)

linear

42.

What is the name of PbS?

a)

Lead (II) Sulfide

b)

Lead (I) Sulfide

c)

Lead Sulfide

d)

Lead (IV) Sulfide

43.

PbCl4 is an example of what type of bond?

a)

Ionic

b)

Covalent

c)

Metallic

d)

Not a bond

44.

What is the name of NaOH?

a)

Sodium oxygen hydride

b)

sodium hydroxide

c)

nitrogen monoxide

d)

sodium monoxyhydride

45.

Carbon-14 has a different number of ____________ than Carbon-12.

a)

ions

b)

neutrons

c)

protons

d)

lipids

46.

The _____________ number of an atom is the number of protons plus the number of neutrons in the nucleus of an atom.

a)

Atomic

b)

mass

c)

electron

d)

weight

47.

What is the shape of the molecule SiH4?

a)

pyramid

b)

tetrahedral

c)

trigonal planar

d)

linear

48.

Which subatomic particle has a negative charge?

a)

proton

b)

neutron

c)

electron

d)

atom

49.

Which subatomic particles are found in the atom's nucleus?

a)

protons and neutrons

b)

protons and electrons

c)

protons only

d)

neutrons and electrons

50.

What is the name of V2O5?

a)

Vanadium Oxide

b)

Vanadium (II) Oxide

c)

divanadium dioxide

d)

Vanadium (V) Oxide

51.

Which element has 77 protons? (use your periodic table)

a)

iridium

b)

gold

c)

radon

d)

bismuth

52.

How are most elements found in nature?

a)

In compounds

b)

as individual atoms

c)

as ions

d)

as carbon

53.

What is the name of P2O10

a)

diphosphorous oxide

b)

diphosphorous pentoxide

c)

diphosphorous decoxide

d)

Phosphorous (X) dioxide

54.

Methane, (CH4) is formed by what type of bonding?

a)

Ionic

b)

covalent

c)

metallic

55.

Why do atoms form bonds?

a)

to fill their outer energy level

b)

to obtain an octet

c)

to become stable

d)

all of the above

56.

What type of ion do metals form?

a)

anions

b)

cations

c)

polyatomic ions

d)

onions

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