Font size
WorksheetsAtom Unit Review
Total questions: 35
Worksheet time: 23mins
If an atom has 10 protons, 10 neutrons, and 10 electrons, what is the atomic mass of the atom?
What is the atomic mass number?
A neutron is ---
a subatomic particle with a negative charge.
a subatomic particle with a neutral charge.
the center of the atom where subatomic particles are found.
a subatomic particle with a positive charge.
A subatomic particle with a positive charge is called --
a proton
a neutron
an electron
a nucleus
A region around the nucleus of an atom where electrons are found.
Electron Nucleus
Electron Cloud
Cloud of Electrons
Electron
The smallest unit of an element that maintains the properties of that element is known as--
a proton
a neutron
an element
an atom
Which subatomic particle(s) are found in the nucleus of the atom? Choose all that apply.
proton
neutron
electron
How many electrons does Barium (Ba) have?
56
81
137
218
What is a compound?
Two different elements bonded together.
Two of the same elements bonded together.
A mixture of different substances.
Two substances stuck together with glue.
Two or more atoms joined together make up a _____.
atom
molecule
solution
What is the chemical symbol of the element Hydrogen?
Hy
H
Hydro
Hg
Which of the following is a chemical formula?
H2SO4
Si
Hg
C
Which of the following is an element symbol?
H2O
O
NaCl
FeO
What is the element symbol for the element Carbon?
C
Ca
Carb
CO
The basic building blocks of the universe.
elements
atoms
molecules
compounds
This is the written out expression for a substance and contains each element in it and the number of atoms for that element.
chemical formula
chemical symbol
The Periodic Table of Elements
pure substance
What is a small particle that is known as the basic building block of matter?
molecule
compound
element
atom
H2O is most accurately described as a ___________________.
molecule
compound
element
atom
Oxygen, Nitrogen, Hydrogen, and Calcium are all examples of ______________________.
molecules
compounds
atoms
elements
Which one of the following is a compound?
NaCl
O2
Hydrogen
He2
Which of these is only a molecule and not a compound?
a
b
c
d
Classify the picture with the correct label.
Element
Compound
Mixture of Elements
What is the atomic number?
the number of protons
the number of protons and neutrons
the number of neutrons
the number of protons and quarks
The fluorine atom has an atomic number of
19
9
Which subatomic particle has a negative charge in the atom?
proton
neutron
electron
quark
The most pure substances that can be found and made of only one type of atom.
elements
atoms
molecules
compounds
