WorksheetsAtoms Review
Total questions: 25
Worksheet time: 13mins
What characteristic of an element's atoms always determines the element's identity?
Number of Protons
Number of Neutrons
Location of Valence Electrons
Number of Valence Electrons
Most of the mass of an atom is found in ...
the electron cloud
the protons
the nucleus
the valence electrons
How many valence electrons are in an atom of each element in Group 15 on the periodic table?
Fifteen
Five
Four
Thirty
Which pair or properties describes the elements in Group 18?
they have eight valence electrons and are flammable
they are magnetic and boil at low temperatures
they are chemically stable and liquid at room temperature
they are gaseous at room temperature and chemically stable
If a group of elements are classified as being shiny, solid at room temperature and have two valence electrons, which of the following elements would belong to that group?
Strontium
Lithium
Aluminum
Silicon
Which two elements on the periodic table are in the same period?
Sn and Rb
F and Cl
K and Ba
Se and Te
Which mystery element would is a noble gas?
3
2
1
4
Where would an element that is pale yellow, a solid and does not conduct electricity be found?
1
2
3
4
How many protons, electrons and neutrons are found in an Argon atom?
18, 22, 22
18, 18, 22
18, 18, 18
21, 18, 18
Which subatomic particles are found in the nucleus?
protons and neutrons
protons and electrons
neutrons and electrons
protons, neutrons and electrons
On the periodic table, moving from right to left ...
reactivity increases
reactivity decreases
number of valence electrons increases
group number increases
How many valence electrons does group 13 have?
3
4
13
26
How many electrons do stable atoms have on their outermost shell?
2
8
10
12
What determines the number of valence electrons?
group number
period number
atomic number
mass number
Which statement does NOT correctly compare silicon with another element?
Silicon is a better conductor of electricity than Sulfur.
Silicon conducts electricity as well as Copper does.
Silicon is a solid at room temperature, but Argon is a gas.
Silicon is less malleable than Silver.
An atom of a certain element has 36 protons, 36 electrons and a mass number of 84. How many neutrons are in this atom?
36
48
84
72
Which of the following best describes an electron?
it has no charge and about the same mass as a proton
it has a negative charge and much less mass than a proton
it has a positive charge and much more mass than a neutron
it has a negative charge and about the same mass as a neutron
How many energy levels does the element Neon have?
3
2
8
10
How many electrons can fit on the 3rd energy level?
2
8
16
10
Which statement about Tin (Sn) is true?
Tin atoms have 50 protons
Tin atoms have five valence electrons
Tin atoms have 119 neutrons
Tin atoms have 68 electrons
Which element is found in period three with five valence electrons?
Magnesium
Silicon
Phosphorus
Chlorine
How many valence electrons does Bromine have?
17
7
5
2
Which group has a full outer energy level?
Alkali Metals
Transitional Metals
Halogens
Noble Gases
Which element is identified as atomic symbol, Co?
Copper
Cobalt
Carbon
Calcium
Which element has 36 protons?
Krypton
Bromine
Potassium
Xenon
