NEW
Font size
S
M
L
XL
WorksheetsPre Test Basic Chemistry
Total questions: 36
Worksheet time: 24mins
Name
Class
Date
1.
the central region of an atom where its neutrons and protons are is its
a)
nucleus
b)
electron cloud
c)
core
d)
center
2.
all matter is made of what
a)
energy
b)
atoms
c)
electrons
d)
compounds
3.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
4.
an atom with atomic number 6 would have how many protons
a)
6
b)
12
c)
3
d)
cannot be determined
5.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
6.
True or False? Neutrons have a negative charge
a)
True
b)
False
7.
A particle that moves around the nucleus is a(n)...
a)
Proton
b)
Neutron
c)
Electron
d)
Quark
8.
Which of the following is a negatively charged subatomic particle?
a)
Electron
b)
Proton
c)
Neutron
d)
Quark
9.
Most of the mass in an atom is concentrated in the....
a)
electrons.
b)
nucleus.
c)
protons.
d)
empty space.
10.
What does the atomic number tell us?
a)
number of protons
b)
number of neutrons
11.
What is the atomic number of the element in the picture?
a)
39.0983
b)
19
12.
What does the number 39.083 represent?
a)
Atomic Number
b)
Chemical Symbol
c)
Average Atomic Mass
d)
Number of electrons
13.
An element's identity is determined by the number of
a)
electrons.
b)
protons.
c)
neutrons.
d)
valence.
14.
If an atom loses 2 electrons it becomes
a)
a +1 ion
b)
a -2 ion
c)
a +2 ion
d)
an isotope
15.
Isotopes have different numbers of
a)
protons
b)
neutrons
c)
electron
d)
properties
16.
Ions are:
a)
atoms with a positive or negative charge
b)
atoms with no charge
c)
atoms with ONLY a positive charge
d)
atoms with ONLY a negative charge
17.
When an atom loses a valence electron, it becomes a(n) _____________ ion.
a)
positive
b)
negative
c)
neutral
d)
polyatomic
18.
Negative ions form when atoms _________ valence electrons.
a)
lose
b)
gain
c)
share
19.
Element is a
a)
pure substance
b)
compound
c)
mixture
d)
molecule
20.
which one only has one type of atom In it.
a)
Element
b)
compound
21.
Is salt (NaCI) a compound or a element
a)
Compound
b)
element
22.
Which of the following is not a compound?
a)
HCl
b)
Cl
c)
NaCl
d)
CO2
23.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
24.
How many Hydrogen atoms are in Water (H2O)
a)
1
b)
2
c)
3
d)
4
25.
Covalent compounds
a)
Share electrons
b)
transfer electrons
c)
contain a sea of electrons
d)
conduct electricity
26.
How are ionic bonds formed?
a)
When atoms share an electron
b)
When electrons are transferred.
c)
When one atom takes a proton
d)
When one atom takes a neutron
27.
To what does the term valance refer?
a)
Electrons in the innermost energy level.
b)
Protons in the innermost energy level.
c)
Electrons in the outermost energy level.
d)
Protons in the outermost energy level.
28.
Which of the following substances would have the greatest concentration of H+ ions?
a)
Ammonia with
pH 13
pH 13
b)
Water with
pH 7
pH 7
c)
Milk with
pH 5
pH 5
d)
Lemon juice with
pH 2
pH 2
29.
What type of substance has an equal concentration of H+ and OH- ions?
a)
Acid
b)
Base
c)
Neutral
30.
What type of bond forms between the oppositely charged ends of two polar molecules?
a)
Non-polar Covalent Bonds
b)
Polar Covalent Bonds
c)
Ionic Bonds
d)
Hydrogen Bonds
31.
How many electrons need to be in the outer shell of most elements to achieve stability?
a)
2
b)
8
c)
10
d)
18
32.
a)
organic
b)
inorganic
33.
a)
organic
b)
inorganic
34.
What is neutral on the pH scale?
a)
7
b)
14
c)
P shape
d)
D shape
35.
Solution with a low pH. Contains a lot of hydrogen ions (H+).
a)
Acidic
b)
Basic
c)
Neutral
36.
Solution with a high pH. Contains a lot of hydroxide (OH-) ions.
a)
Acidic
b)
Basic
c)
Neutral
Reset
