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8.5(ABCD)
Test Description: Atoms, charges, valence electrons, groups, periods, chemical formula
Instructions: Answer all questions to get your test result.
1) An atom's reactivity is determined by the number of
A
electrons in its outer shell.
B
electrons and protons in its nucleus.
C
protons and neutrons in its nucleus.
2) If an atom has 1 valence electron, how many more electrons would be needed to fill the outer shell
A
6
B
0
C
5
D
7
3) The mass number of Carbon represents the total number of
A
protons plus neutrons
B
protons minus neutrons
C
neutrons
D
protons
4) Protons are located in the
A
electron cloud
B
in the nucleus
C
outside the electron cloud and nucleus
D
on the edge of the atom
5) The charge of a proton is
A
neutral
B
positive
C
negative
6) The charge of a neutron is
A
negative
B
neutral
C
positive
7) Electrons have a ____________ charge.
A
neutral
B
positive
C
negative
8) The nucleus of an atom has a ______________ charge
A
negative
B
neutral
C
positive
9) The electron cloud of an atom would have a _________ charge.
A
positive
B
negative
C
neutral
10) Which of these is true about an atom?
A
The electron cloud has a larger mass than the nucleus
B
Atoms contain only two subatomic particles, protons and neutrons
C
Protons weigh more than electrons
D
All atoms contain the same number of valence electrons
11) WWhich subatomic particles have no effect on the net charge of an atom?
A
Protons only
B
Electrons only
C
Neutrons only
D
Protons and electrons
12) Which of these could cause an atom to become LESS reactive?
A
Gaining electrons in its nucleus
B
Losing electrons from its outer most shell
C
Gaining protons
D
Losing neutrons from its electron cloud
13) Which of these best describes an atom with 8 valence electrons?
A
HIghly reactive
B
Reactive
C
Non-reactive
14) Which of these atoms would be most reactive?
A
An atom with 8 valence electrons
B
An atom with 1 valence electron
*select an answer for all questions
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