Font size
WorksheetsAtoms
Total questions: 30
Worksheet time: 30mins
All matter is made of ---
energy.
atoms.
electrons.
compounds.
The negatively charged subatomic particles of an atom are ---
electrons.
positrons.
neutrons.
protons.
The subatomic particles that are neutral and have no charge are ---
protons.
electrons.
neutrons.
The _______ are found in the nucleus of an atom.
neutrons and electrons.
electrons.
protons and neutrons.
protons and electrons.
Neutrons are ______ particles because they have no charge.
negative
positive
neutral
The positively charged subatomic particles of an atom are called ---
electrons
protons
neutrons
The central region of an atom where its neutrons and protons are located is called the ---
nucleus.
electron cloud.
The smallest part of an element is an ---
mixture.
atom.
molecule.
compound.
____ orbit around the nucleus of an atom.
electrons
protons
neutrons
This atom has three protons (+) and three electrons (-). Therefore, it is a ___ atom.
neutral
positive
negative
On this element box, what does the 1.00794 stand for?
atomic mass
atomic number
chemical symbol
How many protons does an atom of Nitrogen have?
14.007
7
If an atom has 10 protons, 10 neutrons, and 10 electrons, estimate its atomic mass.
10 protons + 10 electrons = 20amu
10 protons + 10 neutrons = 20amu
10 electrons + 10 neutrons = 20amu
Which two particles determine the atomic mass?
Protons
Electrons
Neutrons
What is the atomic number of this atom shown in the Bohr model?
11
12
13
can't be determined
Most of the mass of an atom is found in the ---
nucleus
electron cloud
What is the element in the image? You will need to use a Periodic Table to determine the answer. HINT: The atomic number is equal to the number of protons.
lithium
oxygen
magnesium
carbon
What is the element in the image? You will need to use a Periodic Table. HINT: The atomic number is equal to the number of protons.
carbon
lithium
beryllium
nitrogen
How many neutrons does nitrogen have?
7
14
0
6
How many protons does fluorine have?
19
1
9
10
How many electrons does silicon have?
28
14
0
10
Using the diagram as a reference, how many electrons does lithium have in its OUTER shell?
1
3
8
2
Using the diagram as a reference, how electrons does carbon have in its OUTER shell?
2
6
4
1
Using the diagram as a reference, how electrons does neon have in its OUTER shell?
10
8
2
6
What is the atomic number for an element with three protons?
2
1
3
6
How many electrons are in an atom of the element K?
7
2
39
19
How many protons does an atom of Nitrogen have?
14
7
15
18
An atom's atomic number is equal to ---
the number of protons.
the number of protons and neutrons.
the number of neutrons.
How many electrons does an atom of Carbon have on its OUTER shell?
4
2
6
12
