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Study Quiz 4.1
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1

____ is/are so small that we cannot see them, even with powerful microscopes.
A)Particles
B)Amber rods
C)Resin
D)Atoms
2

The ____ is/are the centre of the atom, while the smaller particle(s) swirling around the centre is/are called the ____.
A)nucleus, electrons
B)nucleus, electricity
C)electrons, nucleus
D)electrons, electricity
3

The nucleus contains particles with a(n) ____ charge.
A)unknown
B)positive
C)negative
D)free
4

The electrons have a(n) ____ charge.
A)unknown
B)positive
C)negative
D)free
5

Which statement best describes an uncharged atom?
A)It has an equal number of positive and negative charges.
B)It has an unequal number of positive and negative charges.
C)It has no positive or negative charges.
D)It has a different number of positive and negative electrons.
6

When the number of positive and negative charges in an atom is not equal, the atom is said to have a(n) ____.
A)positive balance
B)imbalance
C)negative balance
D)perfect balance
7

An atom with an imbalance of positive or negative charges is said to be electrically ____.
A)positive
B)negative
C)charged
D)uncharged
8

The electric charge of an atom doesn't depend on ____, but rather, on ____.
A)the total number of positive or negative charges / the balance between the two
B)the balance between the electric charges / the total number of positive or negative charges
C)the imbalance of positive or negative charges / the total number of positive or negative charges
D)having more electrons / the total number of charges
9

Atoms that lose an electron become ____ charged.
A)atomically
B)completely
C)negatively
D)positively
10

Electricity is the result of ____.
A)creating more electrons
B)the movement of electrons
C)the sudden disappearance of old electrons
D)the sudden appearance of old electrons





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