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WorksheetsValence electrons & Molecules
Total questions: 10
Worksheet time: 9mins
Name
Class
Date
1.
Which of the following elements is stable?
a)
Oxygen
b)
Neon
c)
Hydrogen
d)
Carbon
2.
Which of the following elements are stable?
a)
Helium
b)
Hydrogen
c)
Sodium
d)
Bromide
3.
Which of the following elements are unstable?
a)
Carbon
b)
Argon
c)
Krypton
d)
Oxygen
4.
Two or more atoms chemically bonded together are called a
a)
atom
b)
element
c)
molecule
d)
mixture
5.
Which subatomic particles are much smaller than the others and have a negative charge?
a)
protons
b)
neutrons
c)
electrons
6.
The positive particles of an atom are ___________.
a)
electrons
b)
protons
c)
neutrons
7.
Which is an electron?
a)
A
b)
B
c)
C
8.
How many electrons go in the first shell (ring) ?
a)
6
b)
8
c)
4
d)
2
9.
What makes the element carbon so special?
a)
It is next to oxygen on the periodic table.
b)
It can form up to 4 bonds
c)
All life produces carbon
d)
It's not special
10.
With a molecule of water, the electrons are...
a)
together
b)
transferred
c)
shared
d)
not transferred or shared
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