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Unit 2: The Atom Practice Test

Total questions: 50

Worksheet time: 38mins

Name
Class
Date
1.
What is at the center of every atom?
a)
An electron
b)
A compound
c)
A molecule
d)
A nucleus
2.
Which two particles make up the nucleus of an atom?
a)
Protons and Electrons
b)
Protons and Neutrons
c)
Molecules and Compounds
d)
Neutrons and Electrons
3.
The particles with no charge in an atom are the _______.
a)
electrons
b)
neutrons
c)
protons
d)
protons and neutrons
4.
The positively charged particles of an atom are the ________.
a)
electrons
b)
protons
c)
neutrons
d)
protons & neutrons
5.
The negatively charged particles of an atom are the ______.
a)
electrons
b)
protons
c)
neutrons
d)
protons & neutrons
6.
A neutron has this charge
a)
negative
b)
positive
c)
neutral
7.
A particle that moves around the nucleus is a(n)...
a)
Proton
b)
Neutron
c)
Electron
d)
Quark
8.
What number indicates an electron?
a)
1
b)
2
c)
3
d)
4
9.
What is the mass number?
a)
the number of protons
b)
the sum of the number of protons and the number of neutrons in the nucleus of an atom 
c)
the number of electrons
d)
the number of neutrons
10.
What is the atomic number?
a)
number of protons
b)
number of neutrons
11.
Oxygen’s atomic number is 8. This means that an oxygen atom must have
a)
8 electrons
b)
8 protons
c)
8 neutrons
d)
a mass number of 8
12.
 What is the mass number of this element?
a)
5
b)
27
c)
32
d)
59
13.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
14.
Where are electrons of an atom found?
a)
Nucleus
b)
Electron Cloud
c)
Some are in the nucleus and some in the electron cloud.
d)
They are moving everywhere.
15.

The electron cloud model is made up of mostly....

a)

electron cloud

b)

empty space

c)

neutrons

d)

protons

16.
Compared to the charge and mass of a proton, an electron has...
a)
the same charge and a smaller mass
b)
the same charge and same mass
c)
an opposite charge and a smaller mass
d)
an opposite charge and the same mass
17.

Vertical columns of elements (families) on the periodic table with similar properties

a)

period

b)

row

c)

groups

d)

quadrants

18.

What is the name of group number 1?

a)

halogens

b)

noble gases

c)

alkali metals

d)

alkaline earth metals

19.

What is the name of group number 2?

a)

transition metals

b)

halogens

c)

metaloids

d)

alkaline earth metals

20.

where are the metaloids found

a)

far left, vertical

b)

stair step/diagonal

c)

far right horizontal

d)

at the bottom

21.

What group number are the halogens found?

a)

18 (8A)

b)

1

c)

2

d)

17 (7A)

22.

Periodic law states that the elements are arranged according to their atomic ________ so that elements with similar chemical properties are in the same ________ and properties repeat periodically.

a)

numbers, rows

b)

masses, rows

c)

masses, column

d)

numbers, column

23.

A row on the Periodic Table of Elements

a)

family

b)

period

c)

row

d)

isotope

24.
___________ is the only metal that is a liquid at room temperature.
a)
Platinum
b)
Water
c)
Tin
d)
Mercury
25.

Metals (select all that apply)

a)

are found on the right side of the periodic table.

b)

are found on the left side of the periodic table.

c)

are good conductors of heat and electricity.

d)

are brittle.

e)

are malleable and ductile.

26.

Nonmetals (select all that apply)

a)

are found on the right side of the periodic table.

b)

are found on the left side of the periodic table.

c)

are good conductors of heat and electricity.

d)

are brittle.

e)

can be solid, liquids, or gases at room temperature.

27.

Which element is found in group 2, period 6?

a)

Oxygen (O)

b)

Barium (Ba)

c)

Selenium (Se)

d)

Carbon (C)

28.

Which halogen is found in period 4?

a)

Krypton (Kr)

b)

Xenon (Xe)

c)

Bromine (Br)

d)

Iodine (I)

29.

Elements that have the same number of energy levels are said to be in the same ______.

a)

group

b)

period

c)

family

d)

classification

30.

Use your periodic table to find which element has 5 protons.

a)

Lithium

b)

Calcium

c)

Boron

d)

Neon

31.

Isotopes of an element have a different number of...

a)

Protons

b)

Neutrons

c)

Electrons

d)

Mass

32.

Potassium-39 has how many neutrons?

a)

19

b)

18

c)

20

d)

21

33.

76 protons and 114 neutrons

a)

Osmium-114

b)

Osmium-76

c)

Osmium-190

d)

Osmium-190.23

34.

Using the picture, you can determine that Carbon-13 has ____ neutrons.

a)

13

b)

6

c)

12

d)

7

35.
Ions are: 
a)
atoms with a positive or negative charge
b)
atoms with no charge
c)
atoms with ONLY a positive charge
d)
atoms with ONLY a negative charge
36.
Valence electrons are: 
a)
Electrons farthest away from the nucleus
b)
Electrons closest to the nucleus
c)
Electrons that just come and go - they don't stay with the atom
37.

What groups are the most reactive metals?

a)

2 and 3

b)

1 and 18

c)

1 and 2

d)

16 and 17

38.

What groups are the most reactive non metals?

a)

1 and 2

b)

16 and 17

c)

2 and 17

d)

1 and 16

39.

Why are halogens so reactive?

a)

They want to get rid of their only valance electron

b)

They only need one more electron

c)

They are non reactive, they have a full shell

40.
Describe this element.
a)
Highly reactive metal
b)
Highly reactive nonmetal
c)
Stable
d)
Less stable non metal
41.

According to the diagram, which list represents elements that share the most similar chemical properties?

a)

O, Se, and Kr

b)

Se, Cl, and Ne

c)

S, Cl, and Ar

d)

Ne, Ar, and Kr

42.

Which element is the least reactive?

a)

Tin (Sn) because it only has 4 valence electrons.

b)

Gallium (Ga) because it only has 3 valence electrons.

c)

Chlorine (Cl) because it only has 7 valence electrons.

d)

Neon (Ne) because it only has 8 valence electrons.

43.

If X is the symbol for an element, which of the following two symbols represent isotopes of the same element?  

I. 7735X  II. 7733X  III. 8137X  IV. 8135 X

a)

I and II

b)

III and IV

c)

I and IV

d)

I and III

44.

The attraction between these holds the nucleus together.

a)

protons

b)

electrons

c)

quarks

d)

neutrons

45.

The weighted atomic mass of all the different isotopes of an element.

a)

atomic number

b)

average atomic mass

c)

Mass number

d)

Ion

46.

Which element is this?

a)

Nickel

b)

Neon

c)

Sodium

d)

Nitrogen

47.

How many valence electrons?

a)

2

b)

3

c)

4

d)

5

48.

According to the Plum Pudding Model, what is the structure of an atom?

a)

Negatively charged sphere with positively charged electrons embedded in it.

b)

Positively charged sphere with negatively charged electrons embedded in it

c)

Positively charged sphere with positively charged electrons embedded in it.

d)

Negatively charged sphere with negatively charged protons embedded in it.

49.
Silicon is a semiconductor and has properties of both metals and nonmetals. What type of element is Silicon? 
a)
Metal
b)
Nonmetal
c)
Metalloid
d)
Pretty
50.
Iron is a good conductor, malleable and magnetic. What type of element is Iron? 
a)
Metal
b)
Nonmetal
c)
Metalloid
d)
Pretty

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