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Chemistry general revision 2024 - 2025

Total questions: 63

Worksheet time: 3hrs 39mins

Name
Class
Date
1.

What is the atomic number?

a)

the number of protons in the nucleus

b)

the number of neutrons in the nucleus

c)

the number of protons and neutrons in the nucleus

d)

the number of protons in the energy levels

2.

What is the mass number?

a)

the number of protons in the nucleus

b)

the number of neutrons in the nucleus

c)

the number of protons and neutrons in the nucleus

d)

the number of protons and electrons in the atom

3.

What is the atomic number of this atom?

a)

1

b)

3

c)

4

d)

7

4.

How is the number of neutrons in the nucleus of an atom calculated?

a)

Add the number of e- and p+ together

b)

Subtract the number of p+ from the mass number

c)

Subtract the number of e- from p+

d)

Add the mass number to the number of e-

5.

What subatomic particles would you find in the nucleus of an atom?

a)

Protons only

b)

Neutrons and Electrons

c)

Protons and Neutrons

d)

Protons and Electrons

6.

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

a)

12 neutrons

b)

12 protons

c)

12 electrons

d)

24 protons and neutrons

7.

An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.

a)

10

b)

20

c)

25

d)

35

8.

What is the atomic number of the atom pictured?

a)

9

b)

8

c)

18

d)

19

9.

Which of the following determines the identity of an element?

a)

number of protons

b)

number of neutrons

c)

atomic mass

d)

number of shells

10.

Elements which are shiny, conduct electricity and heat are called

a)

metal

b)

metalloid

c)

nonmetal

d)

nonexistent

11.

Atoms with similar properties are most likely located...

a)

in the same period.

b)

in different periods.

c)

in the same group.

d)

to the right and left of each other.

12.

A neutron has a charge of

a)

+2

b)

+1

c)

-1

d)

no charge

13.

Which elements have the most similar chemical properties?

(use your periodic table)

a)

K and Na

b)

K and Cl

c)

K and Ca

d)

K and S

14.

How are elements ordered on the Periodic Table?

a)

Alphabetical Order

b)

By their atomic mass.

c)

By their color.

d)

By their atomic number.

15.

Rows on the period table are called _____ while columns are called _____.

a)

groups, families

b)

periods, groups

c)

groups, periods

d)

families, groups

16.

Metals generally have the following properties EXCEPT for being:

a)

Shiny

b)

Malleable

c)

Non-conductors

d)

Ductile

17.
Electron cloud is based on
a)
Quantum Mechanics
b)
Gold Foil Experiment
c)
Matter is made up of small particles called atoms
d)
Nuclear Theory
18.
James Chadwick discovered the ________.
a)
proton
b)
neutron
c)
electron
d)
nucleus
19.
What did Thomson discover?
a)
electron
b)
proton
c)
neutron
d)
electron cloud
20.

Subatomic particles with a negative charge

a)

Electrons

b)

Neutrons

c)

Protons

d)

Quarks

21.
Subatomic particles with a positive charge
a)
neutrons
b)
atomic mass
c)
protons
d)
isotopes
22.
Where electrons are likely to be found as they travel around the nucleus
a)
Nucleus
b)
Electron Cloud
c)
Within a Proton
d)
Within a Neutron
23.

He claimed that matter was made of small, hard particles that he called “atomos.”

a)

Democritis

b)

Dalton

c)

Moseley

d)

Einstein

24.
The scientist responsible for "discovering" the nucleus is:
a)
Bohr
b)
Rutherford
c)
Schroedinger
d)
Einstein
25.

John Dalton stated:

a)

Atoms are tiny, invisible particles.

b)

Atoms of one element are all the same.

c)

Atoms of different elements are different.

d)

Compounds form by combining atoms.

e)

All of the statements listed.

26.
What scientist is best known for his "Plum Pudding" model of the atom?
a)
J.J. Thomson
b)
Ernest Rutherford
c)
John Dalton
d)
Democritus
27.
Place the following scientists in order, from earliest to latest: 
Rutherford, Dalton, Bohr, Thomson
a)
Dalton, Rutherford, Bohr, Thomson
b)
Thomson, Dalton, Rutherford, Bohr
c)
Dalton, Thomson, Rutherford, Bohr
d)
Bohr, Dalton, Rutherford, Thomson
28.
Who came up with the model of an atom pictured?
a)
J.J. Thompson
b)
Ernest Rutherford
c)
Neils Bohr
d)
James Chadwick
29.
Who discovered the nucleus using the gold foil experiment?
a)
Democritus
b)
Robert Millikan
c)
James Chadwick
d)
Ernest Rutherford
30.
He discovered the electron using cathode ray tube experiment.
a)
Joseph Thomson
b)
John Dalton
c)
Ernest Rutherford
d)
Robert Millikan
31.
He first measured the mass and charge of an electron using the oil drop experiment.
a)
Joseph Thomson
b)
Robert Millikan
c)
John Dalton
d)
Niels Bohr
32.

Select all that apply. What was the main purpose of Millikan's oil drop experiment?

a)

to determine the magnitude of the acceleration due to gravity

b)

to determine the ideal voltage that batteries should contain

c)

to determine the charge of an electron

d)

to determine the mass of a proton

33.

In Millikan's experiment, he examined these forces acting on oil drops:

a)

gravity and normal

b)

normal and friction

c)

electric and normal

d)

gravity and electric

34.

In order to equate the two forces, the oil drop had to be

a)

stationary

b)

moving upward

c)

moving downward

d)

moving diagonally

35.

When comparing the charges of electrons and protons, we can say that

a)

their charges are equal in magnitude and sign

b)

their charge magnitudes and signs are different

c)

their charges are equal in magnitude but opposite in sign

d)

their charge magnitudes are different but their signs are the same

36.

What is the purpose of device ‘A’?

a)

To create an electrical potential difference (voltage) between the plates.

b)

To introduce a fine mist of liquid oil into the chamber.

c)

To magnify the droplets of the oil.

d)

To locate positively charged particles.

37.

What is the purpose of device ‘C’?

a)

To locate positively charge particles.

b)

To create an electrical potential difference (voltage) between the plates.

c)

To introduce a fine mist of liquid oil into the chamber.

d)

To magnify the droplets of oil.

38.

The Millikan Oil-Drop Experiment proved that:

a)

Showed that charges are continuous

b)

Showed that electrons are massless.

c)

Showed that the electric field only interacts with electrons

d)

Showed that charges come in integer multiples of the elementary charge e.

39.

What is the purpose of device ‘D’?

a)

to charge the oil droplets

b)

to magnify the oil droplets

c)

to produce oil droplets

d)

to move oil droplets

40.

How many elements are in this chemical formula?

H2SO4H_2SO_4  

a)

1

b)

2

c)

3

d)

4

41.

How many atoms of Carbon are in this formula? C6 H12O6C_{6\ }H_{12}O_6  

a)

6

b)

1

c)

12

42.

What is the total number of atoms in this formula? H2O2H_2O_2  

a)

2

b)

4

c)

3

43.

What is the total number of atoms in this chemical formula? C8H3NaBr12C_8H_3NaBr_{12}  

a)

18

b)

12

c)

25

d)

24

44.
What atom matches this electron configuration?
1s2 2s2 2p6 3s2
a)
Neon
b)
Magnesium
c)
Aluminum
d)
Potassium
45.
How many electron can be found in a s orbital?
a)
2
b)
3
c)
4
d)
1
46.
How many electron can be found in a p orbital?
a)
2
b)
3
c)
4
d)
6
47.
Which is the electron configuration for an oxygen atom?
a)
1s22s22p63s23p64s2
b)
electronic configuration
1s22s22p4
c)
1s22s22p6
d)
1s22s22p63s23p6
48.
Which guideline, Hund’s rule or the Pauli exclusion principle, is violated in the following orbital diagrams?
a)
Hund's
b)
Aufbau's
c)
Pauli's Exclusive
49.
Which guideline, Hund’s rule or the Pauli exclusion principle, is violated in the following orbital diagrams?
a)
Hund's
b)
Aufbau's
c)
Pauli's Exclusive
50.
Which guideline, Hund’s rule or the Pauli exclusion principle, is violated in the following orbital diagrams?
a)
Aufbau's
b)
Hund's
c)
Pauli exclusive
51.
Which element is pictured?
a)
neon
b)
fluorine
c)
magnesium
d)
argon
52.
Which guideline, Hund’s rule or the Pauli exclusion principle, is violated in the following orbital diagrams?
a)
Aufbau's
b)
Hund's
c)
Pauli exclusive
53.
What is incorrect about this orbital diagram?
a)
Both arrows in the 2p box should be pointing up
b)
There is nothing incorrect with this diagram
c)
In the there should only be 1 orbital in the first 2p box and one in the 2nd 2p box
d)
All the arrows should be pointing up.
54.

Which example shows a violation of Hund's Rule?

a)

A

b)

B

c)

C

d)

D

55.

Which of the following is written correctly?

a)

A

b)

B

c)

C

d)

D

56.
What is the name of Group 1?
a)
Alkali Metals
b)
Alkali Earth Metals
c)
Transition Metals
d)
Halogens
57.
What is the name of Groups 3-12?
a)
Alkali Metals
b)
Alkali Earth Metals
c)
Transition Metals
d)
Halogens
58.
What is the name for the bottom two rows of the table that have been removed?
a)
Alkali Metals
b)
Alkali Earth Metals
c)
Transition Metals
d)
Lanthanides and Actinides
59.
How do I know the Cl is a capital "C" and lowercase "L" and not an uppercase "i"?
a)
That element does not have an "i" in its name.
b)
The first letter of all element symbols is always capitalized.
c)
All elements have two letter.
d)
It is an uppercase "i"
60.

You have the elements Mg, Ba, Be, Ca. Which has the lowest electronegativity?

a)

Mg

b)

Ba

c)

Be

d)

Ca

61.

You have Mg, Ba, Be and Ca. Which element has the highest ionization energy.

a)

Mg

b)

Ba

c)

Be

d)

Ca

62.

You have Mg, Ba, Be, and Ca. Which has the largest atomic radius

a)

Mg

b)

Ba

c)

Be

d)

Ca

63.

You have the elements Sb, Sn, Te, and I. Which has the lowest ionization energy?

a)

Sb

b)

Sn

c)

Te

d)

i

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