wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Unit 2 Atoms and the Periodic Table Review

Total questions: 56

Worksheet time: 28mins

Name
Class
Date
1.

What is an Atom?

4 lines
2.
The Greek philosopher Democritus coined what word for a tiny piece of matter that cannot be divided?
a)
element
b)
atom
c)
electron
d)
molecule
3.

Using your Periodic Table, what is the atomic number for Oxygen?

(a)  

4.

Using your Periodic Table, how many neutrons does Chlorine have?

(a)  

5.

Using your Period Table, how many electrons does Argon have?

(a)  

6.
Democritus thought that matter was made of tiny particles
a)
of earth, air, fire, and water.
b)
that could not be divided.
c)
that could be divided.
d)
that were all round and smooth.
7.
Which of the following most accurately represents John Dalton's model of the atom?
a)
a tiny, solid sphere with an unpredictable mass for a given element
b)
a hollow sphere with a dense nucleus
c)
a tiny, solid sphere with a predictable mass for a given element
d)
a sphere that is hollow throughout
8.
Who provided evidence for the existence of a nucleus in an atom?
a)
John Dalton
b)
J.J. Thomson
c)
Democritus
d)
Ernest Rutherford
9.
In an atomic model that includes a nucleus, the positive charge is
a)
concentrated in the center of an atom.
b)
spread evenly throughout an atom.
c)
concentrated at multiple sites in an atom.
d)
located in the space outside the nucleus.
10.
Which subatomic particle has a negative charge?
a)
electron
b)
alpha particle
c)
neutron
d)
proton
11.
Which statement about subatomic particles is NOT true?
a)
Protons and neutrons have almost the same mass.
b)
Protons and electrons have opposite charges.
c)
Unlike protons and electrons, neutrons have no charge.
d)
Protons and neutrons have the same charge.
12.
Which of the following is unique for any given element?
a)
the number of neutrons
b)
the charge on the electrons
c)
the number of protons
d)
the mass of the neutron
13.
The number of protons in one atom of an element is the same as the
a)
mass number.
b)
balanced charge.
c)
atomic number.
d)
isotope.
14.
Suppose an atom has an atomic number of 23. Which statement is true beyond any doubt?
a)
The atom has an odd number of neutrons.
b)
The atomic number is less than 11.
c)
The atom is not an isotope.
d)
The symbol is V
15.
Which statement is true about oxygen-17 and oxygen-18?
a)
They do not have the same number of protons.
b)
Their atoms have an identical mass.
c)
They are isotopes of oxygen.
d)
They have the same mass number.
16.
In Niels Bohr's model of the atom, electrons move
a)
like balls rolling down a hill.
b)
like planets orbiting the sun.
c)
like popcorn in a popcorn popper.
d)
like beach balls on water waves.
17.
Which statement accurately represents the arrangement of electrons in Bohr's atomic model?
a)
Electrons vibrate in fixed locations around the nucleus.
b)
Electrons travel around the nucleus in fixed energy levels with energies that vary from level to level.
c)
Electrons travel around the nucleus in fixed energy levels with equal amounts of energy.
d)
Electrons travel randomly in the relatively large space outside the nucleus.
18.
What does the electron cloud model describe?
a)
the most likely locations of electrons in atoms
b)
the precise locations of electrons in atoms
c)
the number of electrons in an atom
d)
the mass of the electrons in an atom
19.
Which statement about electrons and atomic orbitals is NOT true?
a)
8 electrons fit in the first energy level.
b)
An orbital can contain a maximum of two electrons.
c)
An electron cloud represents all the orbitals in an atom.
d)
An atom's lowest energy level has only one orbital.
20.
Mendeleev arranged the known chemical elements in a table according to increasing
a)
neutrons.
b)
number of electrons.
c)
number of orbitals.
d)
mass.
21.
The figure shows a portion of a blank periodic table. Identify the segments labeled A and B.
a)
A and B are both periods.
b)
A is a period and B is a group.
c)
A and B are both groups.
22.
The AMU stands for...
a)
Atomic cookies
b)
Atomic mega units
c)
Atomic matter units
d)
Atomic mass unit
23.
The atomic mass is an average because it's ...
a)
the sum of the protons and neutrons in one atom of the element.
b)
twice the number of protons in one atom of the element.
c)
a ratio based on the mass of a carbon-12 atom.
d)
a weighted average of the masses of an element's isotopes.
24.
The unit for atomic mass is
a)
gram
b)
amu
c)
pound
d)
none of the above
25.
Which list of elements contains only metals?
a)
carbon, iodine, tin
b)
tin, copper, cesium
c)
helium, iron, copper
d)
iodine, carbon, argon
26.
Which statement is true about the metalloid silicon?
a)
Silicon is a better conductor of electric current than silver is.
b)
Silicon does not conduct electric current under any conditions.
c)
Silicon's ability to conduct electric current does not vary with temperature.
d)
Silicon is a better conductor of electric current than sulfur is.
27.
At room temperature, none of the metals are
a)
soft.
b)
liquids.
c)
malleable.
d)
gases.
28.
Which general statement does NOT apply to metals?
a)
Most metals are ductile.
b)
Most metals are malleable.
c)
Most metals are brittle.
d)
Most metals are good conductors of electric current.
29.
Two highly reactive elements in Period 2 are the metal lithium and the
a)
metalloid arsenic.
b)
nonmetal selenium.
c)
nonmetal fluorine.
d)
nonmetal krypton.
30.
As you move from left to right across a period, the number of valence electrons
a)
increases.
b)
stays the same.
c)
increases and then decreases.
d)
decreases.
31.
Compared with Group 2A elements, Group 6A elements have
a)
more atoms in the ground state.
b)
more valence electrons.
c)
more isotopes.
d)
fewer valence electrons.
32.
The tendency of an element to react is closely related to
a)
its atomic mass
b)
attractions between its atoms.
c)
the number of valence electrons in atoms of the element.
d)
the ratio of protons to neutrons in atoms of the element.
33.
Which statement is NOT true about the elements fluorine, chlorine, and iodine?
a)
They are all halogens.
b)
They react easily with metals.
c)
They are similar to noble gases.
d)
They are all nonmetals.
34.
Which of the following Group 1A elements is the most reactive?
a)
Cs (cesium)
b)
Li (lithium)
c)
K (potassium)
d)
Na (Sodium)
35.
Which of the following Group 7A elements is the most reactive?
a)
Cl (chlorine)
b)
I (iodine)
c)
F (fluorine)
d)
Br (bromine)
36.
Among the alkali metals, the tendency to react with other substances
a)
does not vary among the members of the group.
b)
increases from top to bottom within the group.
c)
varies in an unpredictable way within the group.
d)
decreases from top to bottom within the group.
37.
Which halogen is most likely to react?
a)
Br (bromine)
b)
F (fluorine)
c)
I (iodine)
d)
Cl (chlorine)
38.
Which element is identified as an alkaline metal?
a)
sodium
b)
helium
c)
oxygen
d)
nitrogen
e)
barium
39.
Identify the transition metal?
a)
iodine
b)
potassium
c)
iron
d)
carbon
40.
What is the process in which an unstable atomic nucleus emits charged particles. or energy or both?
a)
radioactivity
b)
oxidation
c)
decomposition
d)
none of the above
41.
Uranium-238 undergoes alpha decay. Therefore, Uranium-238 will
a)
remain stable.
b)
change into a different element altogether.
c)
emit neutral particles and no energy.
d)
none of the above.
42.
The half-life of tritium, or hydrogen-3, is 12.32 years. After about 24.6 years, how much of a sample of tritium will remain unchanged?
a)
1/8
b)
1/4
c)
1/3
d)
1/2
43.
Which of the following particles is smaller than the rest?
a)
electron
b)
proton
c)
neutron
d)
alpha particle
44.
Which of the following characteristics are of non-metals (Choose ALL that apply).
a)
brittle
b)
dull
c)
poor conductor
d)
shiny
e)
ductile
45.
The diagram shown is a Bohr model of which element
a)
Silicon
b)
Sodium
c)
Magnesium
d)
Nickel
e)
Carbon
46.

Which of the following best describes a period on the periodic table?

a)

A section containing only metals

b)

A group of elements with similar properties

c)

A horizontal row of elements

d)

A vertical column of elements

47.

What is the charge of a neutron?

a)

Positive

b)

Variable

c)

Negative

d)

Neutral

48.

Which scientist is credited with discovering the electron?

a)

John Dalton

b)

Dmitri Mendeleev

c)

J.J. Thomson

d)

Niels Bohr

49.

Which of the following particles has a negative charge?

a)

nucleus

b)

electron

c)

neutron

d)

proton

50.

What is the main difference between isotopes of the same element?

a)

Number of protons

b)

Chemical symbol

c)

Number of neutrons

d)

Number of electrons

51.

Which of the following statements best describes a property of noble gases?

a)

They are highly reactive with metals.

b)

They have a full outer electron shell.

c)

They easily form positive ions.

d)

They are all solid at room temperature.

52.

What is the main difference between protons and electrons?

a)

Protons and electrons have the same mass.

b)

Protons have a positive charge, electrons have a negative charge.

c)

Protons are found outside the nucleus, electrons are inside the nucleus.

d)

Protons have a negative charge, electrons have a positive charge.

53.

Which scientist is credited with developing the first periodic table?

a)

John Dalton

b)

Dmitri Mendeleev

c)

Niels Bohr

d)

Ernest Rutherford

54.

Which scientist proposed the planetary model of the atom?

a)

J.J. Thomson

b)

Ernest Rutherford

c)

Niels Bohr

d)

Dmitri Mendeleev

55.

What do elements in the same group of the periodic table have in common?

a)

Same number of valence electrons

b)

Same number of neutrons

c)

Same number of protons

d)

Same atomic mass

56.

Which of the following statements best describes an isotope?

a)

Atoms with the same number of protons but different numbers of neutrons

b)

Atoms with different numbers of protons and electrons

c)

Atoms with the same mass number but different atomic numbers

d)

Atoms with the same number of neutrons but different numbers of protons

Similar Resources on Wayground

ÔN TẬP GIỮA HK I - TIN 9

53 questions

ÔN TẬP GIỮA HK I - TIN 9

quiz

Worksheet

•

KG - University

Micoreconomics Unit Test Review Questions

55 questions

Micoreconomics Unit Test Review Questions

quiz

Worksheet

•

12th Grade