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Lembar kerjaElectric Charge & Static
Total soal: 20
Worksheet time: 12mins
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1.
Which is most likely to form a negative ion?
a)
an element from group 17
b)
a metal
c)
an element from group 1
d)
an element with atoms that have eight valence electrons
2.
When an atom loses a valence electron, it becomes a(n) _____________ ion.
a)
positive
b)
negative
c)
neutral
d)
polyatomic
3.
Positive ions form when atoms _________ valence electrons.
a)
lose
b)
gain
c)
share
d)
gain or share
4.
Group 17 always has ions with a charge of
a)
+1
b)
+2
c)
-1
d)
-2
5.
How many protons are in this element?
a)
79
b)
196
c)
117
d)
Cannot be determined
6.
What charge does an atom have if it LOSES an electron?
a)
Positive (+)
b)
Negative (-)
7.
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
8.
What charge does an atom have if it GAINS an electrons?
a)
Positive (+)
b)
Negative (-)
9.
What charge will an Oxygen ion have?
a)
+1
b)
-1
c)
+2
d)
-2
10.
A positive ion is called a
a)
cation
b)
anion
11.
A anion will be a ____ ion.
a)
negative
b)
positive
12.
What types of charges attract?
a)
Positive and Positive
b)
Positive and Neutral
c)
Negative and Neutral
d)
Positive and Negative
13.
Walking across a carpet is an example of charge being transferred by
a)
friction.
b)
induction.
c)
contact.
d)
static electricity
14.
Electric charges that are alike _______ each other.
a)
Attract
b)
Repel
15.
The teacher rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other?
a)
The balloons will repel each other.
b)
The balloons will attract each other.
c)
The balloons will become positively (+) charged.
d)
The balloons will pop.
16.
What charge does an electron have?
a)
negative (-)
b)
positive (+)
c)
neutral or no charge (0)
17.
If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?
a)
A positive charge.
b)
A negative charge.
c)
A neutral charge
d)
No charge at all
18.
True or False, Lighting is a form of static electricity.
a)
True
b)
False
19.
What makes a charged balloon stick to the wall?
a)
Protons transferred to the balloon when it was rubbed on metal.
b)
Extra electrons on the surface of the balloon push away electrons in the wall, leaving a positively charged area.
c)
The rubber in the balloon has a magnetic field that pulls on the wood in the wall.
d)
Electricity in the balloon creates a magnetic field that attracts the metal in the wall.
20.
What happens when you touch a metal doorknob after rubbing your shoes on the carpet?
a)
The doorknob sends a burst of electric current into your body
b)
Millions of electrons go from your finger into the doorknob
c)
The doorknob sends millions of electrons into your finger
d)
our finger becomes negatively charged
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