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Atoms

Total questions: 41

Worksheet time: 2hrs 44mins

Name
Class
Date
1.
The positive particles of an atom are 
a)
electrons 
b)
positrons 
c)
neutrons 
d)
protons 
2.
the central region of an atom where its neutrons and protons are is its 
a)
nucleus 
b)
electron cloud
c)
core 
d)
center 
3.
an atom with atomic number 6 would have how many protons 
a)
6
b)
12
c)
3
d)
cannot be determined 
4.
Particles in an atom that are neutral and have no charge are 
a)
negatrons 
b)
electrons 
c)
neutrons 
d)
protons 
5.
A particle that moves around the nucleus is a(n)...
a)
Proton
b)
Neutron
c)
Electron
d)
Quark
6.

What does the 1.00794 stand for?

a)

mass number

b)

atomic number

c)

average atomic mass

d)

number of protons

7.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
8.

If an atom has 12 protons, which of the following must it also have to be considered a neutral atom?

a)

12 neutrons

b)

12 electrons

c)

12 protons

d)

24 protons and neutrons

9.
If an atom has 10 protons, 10 neutrons, and 10 electrons, what is the mass of the atom?
a)
10
b)
20
c)
30
10.

What charge does an atom have when it GAINS electrons?

a)

Positive

b)

Negative

c)

Neutral

11.

What two particles determine the mass number?

a)

Protons and electrons

b)

Electrons and neutrons

c)

Protons and neutrons

12.

When an atom loses an electron, it becomes a(n) _____________ ion.

a)

positive

b)

negative

c)

neutral

d)

polyatomic

13.

If the mass number of this chlorine atom is 36, how many neutrons does it have?

a)

17

b)

18

c)

19

d)

can't be determined

14.

What is the atomic number of this atom shown in the Bohr model?

a)

11

b)

12

c)

13

d)

can't be determined

15.

What is the mass number of the atom shown in the Bohr model?

a)

11

b)

12

c)

23

d)

Can't be determined

16.

Is this atom an ion? If so what would it's charge be?

a)

Yes, 1-

b)

No it is neutral

c)

Yes, 1+

d)

Can't be determined

17.

Most of the mass of an atom is found in the ______.

a)

nucleus

b)

proton

c)

electron cloud

d)

isotope

18.
An atom with an unequal number of protons and electrons is said to have (a) ___.
a)
no charge
b)
balance
c)
charge
d)
unbalance
19.
Two atoms of the same element but with different mass numbers are called________
a)
electrons
b)
isotopes
c)
variables
d)
electron cloud
20.

What is a representation of an ion?

a)

Li

b)

Na-22

c)

O-2

21.

What is the mass number of bromine?

a)

35

b)

45

c)

80

d)

79.904

22.

How many neutrons does this bromine atom have?

a)

35

b)

45

c)

80

23.

What type of atom is this?

a)

Neutral atom

b)

Cation

c)

Anion

d)

Isotope

24.

To form an ion, what changes?

a)

The number of electrons

b)

The number of protons

c)

The number of neutrons

25.

What is the representation of an isotope?

a)

N-3

b)

Al+3

c)

Si

d)

P-33

26.
What are the 3 particles that make-up the atom?
a)
protons, neutrons, and isotopes
b)
neutrons, isotopes, and electrons
c)
positives, negatives, and electrons
d)
protons, neutrons, and electrons
27.

Using the diagram as a reference, how electrons does neon have?

a)

10

b)

8

c)

2

d)

6

28.

Using the diagram as a reference, tell the charge of the atom?

a)

+2

b)

+4

c)

0

d)

-2

29.

Why is the overall charge of this atom neutral?

a)

They have the same number of protons and neutrons.

b)

They have the same number of protons and electrons.

c)

They have the same number of electrons and neutrons.

30.

An atom of Boron has 5 protons and 2 electrons. What is it's charge?

a)

+3

b)

-3

c)

+2

d)

0

31.

What is a positive ion called?

a)

anion

b)

cation

c)

isotope

d)

covalent

32.

What is a negative ion called?

a)

anion

b)

cation

c)

covalent

d)

isotope

33.

How many electrons would a Nitrogen ion gain/lose? If it has 5 valence electrons.

a)

lose 5

b)

gain 5

c)

lose 3

d)

gain 3

34.

If an atom loses electrons, the charge will be positive.

a)

true

b)

false

35.
What do these isotopes of carbon all have in common?
a)
neutrons & mass number
b)
atomic number and neutrons
c)
atomic number and electrons
d)
protons, atomic number, and mass number
36.
What quantities vary between isotopes of an element?
a)
protons, electrons, and atomic mass
b)
protons, electrons, and atomic number
c)
neutrons and electrons
d)
neutrons and atomic mass
37.

Which color on the image of the periodic table corresponds with the halogens.

a)

red

b)

black

c)

blue

d)

orange

38.

Which color on the image of the periodic table corresponds with the alkaline earth metals.

a)

yellow

b)

dark yellow

c)

blue/green

d)

teal

39.

What is a metalloid?

a)

Elements that have properties that are a mixture of metal and non-metal properties

b)

Elements that are shiny

c)

Elements that want to be metals, but are non-metals

d)

Metalloids don't exist

40.

Which color on the image of the periodic table corresponds with the noble gases.

a)

red

b)

black

c)

blue

d)

orange

41.

Which element below is the most reactive?

a)

F

b)

Na

c)

Ca

d)

He

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