WorksheetsChemistry Reveiw
Total questions: 38
Worksheet time: 19mins
Name
Class
Date
1.
An element is a substance that cannot be broken down into a simpler form.
a)
True
b)
False
2.
The atom is the smallest part of an element that has the properties of that element.
a)
True
b)
False
3.
A molecule is formed when atoms share ________ .
a)
Protons
b)
Neutrons
c)
Electrons
d)
All of the above
4.
A proton is a _________ charged particle.
a)
Positively
b)
Negatively
c)
Neutrally
5.
A ________ is formed when 2 or more different elements combine chemically.
a)
Atom
b)
Compound
c)
Molecule
d)
Combination
6.
A neutron is a _______ charged particle.
a)
Positivley
b)
Negatively
c)
Neither, it's neutral
d)
None of the above
7.
Electrons occupy orbits, or shells, that surround the nucleus.
a)
False
b)
True
8.
If two negative charges were placed near each other, they would _______. (repel or attract)
a)
Repel
b)
Attract
c)
None of the above
9.
On the periodic table, what is the bottom number of each element?
a)
Atomic number
b)
# of electrons
c)
Atomic mass
d)
# of neutrons
10.
__________ were ancient scientists looking for a way to turn ordinary metals into gold.
a)
Chemists
b)
Physicists
c)
Doctors
d)
Alchemists
11.
All atoms have protons, neutrons, and electrons.
a)
False
b)
True
12.
What sub-atomic particles are found in the nucleus?
a)
Protons only
b)
Neutrons only
c)
Protons & neutrons
d)
Protons & electrons
13.
The ______ shows the arrangement of the chemical elements according to their atomic numbers and chemical properties.
a)
Table of Elements
b)
Periodic Table
c)
Chemical Table
d)
Chemical Table of Elements
14.
Electrically balanced atoms have the same number of protons and electrons.
a)
True
b)
False
15.
The atomic number tells how many protons are in the atoms.
a)
False
b)
True
16.
Chlorine (Cl) has an atomic mass of 35 and an atomic number of 17. How many protons does it have?
a)
17
b)
18
c)
35
d)
None
17.
Chlorine (Cl) has an atomic mass of 35 and an atomic number of 17. How many electrons does it have?
a)
17
b)
18
c)
35
d)
None
18.
The atomic mass of an element equals the sum of the number of protons and neutrons.
a)
True
b)
False
19.
An acid releases positively charged hydrogen ions (H+).
a)
False
b)
True
20.
A solution that is neither acid or base, such as drinking water, has a pH close to ___?
a)
0
b)
10
c)
7
d)
12
21.
What is the lightest element on Earth?
a)
Helium
b)
Oxygen
c)
Nitrogen
d)
Hydrogen
22.
A(n) ____ is a charged particle, atom, or molecule.
a)
Acid
b)
Base
c)
Ion
d)
Neutron
23.
When balancing chemical equations, the subscript as well as the coefficient numbers will change.
a)
True
b)
False
24.
Litmus paper and phenolphthalein are kinds of ________.
a)
Acids
b)
Indicators
c)
Bases
d)
Molecules
25.
A ______ is the neutral particle found in the nucleus of atoms and has no charge.
a)
Neutricle
b)
Neutrane
c)
Neutral
d)
Neutron
26.
The center of an atom is called the ______.
a)
Nucleus
b)
Orbit
c)
Shell
d)
Neutron
27.
To decrease the concentration of a solution is to ________ it.
a)
Minimize
b)
Mix
c)
Dilute
d)
Compound
28.
_____ is the path that the electron follows around the center of an atom.
a)
Gravity
b)
Orbit
c)
Balance
d)
None of the above
29.
A ____ is the attraction that holds 2 or more atoms together.
a)
Charge
b)
Magnetism
c)
Bond
d)
All of the above
30.
A ____ is any group of compounds that produce negatively charged hydroxide (OH-) ions when dissolved in water.
a)
Base
b)
Acid
c)
Compound
d)
Molecule
31.
Atoms are measured in _____.
a)
AMU's
b)
lbs
c)
oz.
d)
mm.
32.
A ______ is a property of an ion that causes it to bond with other ions.
a)
Bond
b)
Base
c)
Charge
d)
Shell
33.
There are about _____ different elements on Earth.
a)
120
b)
1,200
c)
12
d)
1,200,000
34.
If an atom gains extra electrons, it will become positively charged.
a)
True
b)
False
35.
What color will a piece of blue litmus paper turn if dipped in a solution containing a base?
a)
Red
b)
Pink
c)
Stays blue
d)
None of the above
36.
________ is a chemical reaction between an acid and a base which produces water and salt.
a)
Neutralization
b)
Concentration
c)
Ionization
d)
Moleculation
37.
______ is the indicator used to show the presence of bases.
a)
Litmus paper
b)
Acidic paper
c)
Peroxide
d)
Phenolphthalein
38.
What color will a piece of blue litmus paper turn if dipped in a solution containing acid?
a)
Stays blue
b)
Pink
c)
Red
d)
None of the above
100 %
