Worksheetsio's theory
Total questions: 15
Worksheet time: 10mins
Name
Class
Date
1.
Valence electrons are:
a)
Electrons farthest away from the nucleus
b)
Electrons closest to the nucleus
c)
Electrons that just come and go - they don't stay with the atom
2.
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
3.
When an atom loses a valence electron, it becomes a(n) _____________ ion.
a)
positive
b)
negative
c)
neutral
d)
polyatomic
4.
Negative ions form when atoms _________ valence electrons.
a)
lose
b)
gain
c)
share
5.
all matter is made of what
a)
energy
b)
atoms
c)
electrons
d)
compounds
6.
the central region of an atom where its neutrons and protons are is its
a)
nucleus
b)
electron cloud
c)
core
d)
center
7.
an atom with atomic number 6 would have how many protons
a)
6
b)
12
c)
3
d)
cannot be determined
8.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
9.
True or False? Neutrons have a negative charge
a)
True
b)
False
10.
Na ionizes to a charge of _______
a)
+1
b)
+2
c)
-1
d)
-2
11.
Li ionizes to a charge of _________
a)
+2
b)
+1
c)
-1
d)
-2
12.
K ionizes to a charge of _________.
a)
+1
b)
+2
c)
-1
d)
-2
13.
What will nitrogen's charge be as an ion (What is the charge of the nitride ion)?
a)
+3
b)
-3
c)
0
d)
-1
14.
How many electrons will a neutral potassium atom lose to become stable?
a)
1
b)
2
c)
8
d)
7
15.
How many total electrons does O-2 (an oxide ion) have?
a)
8
b)
10
c)
6
d)
18
100 %
