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WorksheetsBCHS Chemical Bonding Review
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
What can group numbers of the periodic table help you to determine?
a)
Electrons
b)
protons
c)
atomic number
d)
valence electrons
2.
Which of the following is NOT a property of most metals?
a)
malleability
b)
ductility
c)
brittleness
d)
electrical conductivity
3.
What are the only parts of the atom that make chemical bonds?
a)
protons
b)
neutrons
c)
valence electrons
d)
any electrons
4.
Why do noble gases under normal conditions not form chemical bonds?
a)
They all have 2 valence electrons and don't have to
b)
their outer energy level/orbit is empty
c)
their outer orbit is full of valence electrons
d)
they all have 8 neutrons
5.
If a you saw the following, K+; what does it tell you about the the ion.
a)
it has lost one electron
b)
it has lost one proton
c)
it has lost two electrons
d)
it is a negative ion
6.
The joining of atoms to form new substances is called?
a)
proton bonding
b)
mixtures
c)
compounds
d)
chemical bonding
7.
How many electrons are needed to fill the outer orbit of most atoms?
a)
2
b)
4
c)
6
d)
8
8.
When an element loses or gains an electron, it is called a?
a)
atoms
b)
ion
c)
molecule
d)
compound
9.
The atomic number of an element tells you what about that element?
a)
number of ions
b)
number of valence electrons
c)
number of electrons
d)
what is an element?
10.
This type of model shows only the valence electrons of an element?
a)
Bohr diagram
b)
Childers model
c)
Lewis-dot diagram
d)
What is a valence electron again?
11.
In a covalent bond, one or more electrons are?
a)
shared
b)
lost
c)
gained
d)
transferred
12.
Which type of element has few valence electrons (1 or 2) and is eager to lose them?
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
13.
A chemical bond is:
a)
Made up of electrons
b)
An attractive force that holds atoms together
c)
All of the above
d)
None of the above
14.
If an atom of nitrogen gains 3 electrons, what is its overall charge?
a)
Neutral - No charge
b)
+3
c)
-3
d)
-1
15.
If "ionization" is the process of an atom becoming an ion, which of the following describes this?
a)
The atom jumps from one period to another
b)
Atom loses or gains protons
c)
Lithium turns into flourine
d)
Atom loses or gains electrons
16.
Carbon tetrachloride contains how many atoms of chlorine?
a)
1
b)
2
c)
3
d)
4
17.
Protons are important for chemical bonding.
a)
TRUE
b)
FALSE
18.
The charge of a normal atom is:
a)
Positive
b)
Neutral
c)
Negative
19.
Electrons have a charge of:
a)
-1
b)
-2
c)
+1
d)
+2
20.
Protons have a charge of:
a)
-1
b)
+1
c)
-2
d)
+2
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