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Atoms and the Periodic Table

Total questions: 43

Worksheet time: 37mins

Name
Class
Date
1.
What is an atomic number?
a)
The number of protons in an element
b)
The number of neutrons in an element
c)
The number of protons and neutrons.
d)
The number of protons and electrons.
2.
What is the atomic number of an element with 12 protons, 13 neutrons and 12 electrons?
a)
12
b)
13
c)
25
d)
24
3.
Changing the number of electrons in an atom results in the formation of :
a)
positive ion only
b)
positive  ion or negative ion
c)
negative ion only
d)
new atom
4.
When there are the same number of protons and electrons in an atom, that atom is a...
a)
positive ion.
b)
negative ion.
c)
unstable isotope.
d)
neutral atom.
5.
An element can be defined by the number of ___________ in the nucleus of its atoms.
a)
protons
b)
neutrons
c)
electrons
d)
atoms
6.
Electrons are located outside the nucleus of an atom.
a)
True
b)
False
7.
What is the atomic number of an element with 12 protons, 13 neutrons and 12 electrons?
a)
12
b)
13
c)
25
d)
24
8.
Changing the number of neutrons in an atom results in the formation of a(an) _______
a)
atom
b)
isotope
c)
anion ( a negative ion)
d)
cation (a positive ion)
9.
How many protons are in an atom of carbon?
a)
12.01
b)
8
c)
6
d)
14
10.
How many electrons does a neutral carbon atom have?
a)
0
b)
2
c)
14
d)
6
11.
Examine the label of the atom. Which is an electron?
a)
A
b)
B
c)
C
12.
Examine the label of the atom. Which is a proton?
a)
A
b)
B
c)
C
13.
Examine the label of the atom. Which is a neutron?
a)
A
b)
B
c)
C
14.
The combined mass of protons and neutrons are called_______.
a)
mass number
b)
weight number
c)
atomic number
d)
isotope number
15.
What is the name of the positively charged particle found in the center of the atom?
a)
proton
b)
electron
c)
neutron
16.
Isotopes are atoms of the same element that have the same number of __________ but different number of __________ . Therefore, isotopes of the same element have different masses. 
a)
protons, neutrons
b)
protons, electrons
c)
neutrons, protons
d)
electrons, protons
17.
What is the atomic number of this atom?
a)
2
b)
4
c)
6
d)
none of the above
18.
An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.
a)
20
b)
10
c)
5
d)
25
19.
What is the atomic number of the element shown? 
a)
19
b)
39
c)
20
20.
How many neutrons are contained in a neutral atom of: 
a)
7
b)
14
c)
8
d)
9
21.
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
22.
An element is: 
a)
a substance that cannot be broken down into any other substance
b)
found on the periodic table
c)
made up of atoms
d)
All answers are correct
23.

How many neutrons are in the element shown if its mass number is 39?

a)

19

b)

39

c)

20

24.

What happens to the atomic numbers as you move from left to right on the periodic table?

a)

Increase

b)

Decrease

c)

Stay the same

d)

Nothing

25.

Which of the following elements is most likely to have similar properties to those of sodium (Na)?

a)

Magnesium (Mg)

b)

Sulfur (S)

c)

Francium (Fr)

d)

Titanium (Ti)

26.

Which element is located in group 3?

a)

Yttrium (Y)

b)

Carbon (C)

c)

Sodium (Na)

d)

Lithium (Li)

27.

Which element is located in period 4?

a)

Zirconium (Zr)

b)

Silicon (Si)

c)

Beryllium (Be)

d)

Iron (Fe)

28.

Two elements that have similar physical and chemical properties are most likely in the same...

a)

period

b)

row

c)

group

29.

Which element is most likely to have six valence electrons?

a)

Barium (Ba)

b)

Carbon (C)

c)

Oxygen (O)

d)

Americium (Am)

30.

Which element is most likely to have three electron energy levels?

a)

Argon (Ar)

b)

Lithium (Li)

c)

Boron (B)

d)

Europium (Eu)

31.

Which element is located in period 4 and group 5?

a)

Vanadium (V)

b)

Zirconium (Zr)

c)

Niobium (Nb)

d)

Titanium (Ti)

32.

In which group would an element that is not reactive most likely be located?

a)

1

b)

2

c)

16

d)

18

33.

In which group would an element that is very reactive most likely be located?

a)

1

b)

5

c)

15

d)

18

34.

Which of the following elements is most likely a metal?

a)

W

b)

X

c)

Y

d)

Z

35.

Which of the following elements is most likely a poor conductor of electricity?

a)

Beryllium (Be)

b)

Gold (Au)

c)

Phosphorus (P)

d)

Copper (Cu)

36.
Which of these elements has an electron structure most similar to that of element X?
a)
1
b)
2
c)
3
d)
4
37.
The number of valence electrons in an element affects the reactivity of that element. Which element listed has the fewest valence electrons?
a)
beryllium (Be)
b)
sodium (Na) 
c)
oxygen (O) 
d)
neon (Ne)
38.
According to the Periodic Table of the Elements, which set of elements has similar properties?
a)
H, C, I
b)
He, H, Al
c)
He, Ne, Ar
d)
Na, Ca, Al
39.
Which element has a full valence shell?
a)
F
b)
D
c)
C
d)
E
40.

Which element has 3 valence electrons?

a)

A

b)

B

c)

E

d)

C

41.
Which elements have the same number of valence electrons?
a)
A & C
b)
E & C
c)
F & A
d)
F & B
42.
How many energy levels does an atom of Chlorine have?
a)
2
b)
3
c)
4
d)
7
43.
Which element has the same number of valence electrons as this element?
a)
Bromine (Br)
b)
Nitrogen (N)
c)
Calcium (Ca)
d)
Boron (B)

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