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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 and protons in its nucleus.
B
electrons in its outer shell.
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
7
D
5
3) The mass number of Carbon represents the total number of
A
neutrons
B
protons plus neutrons
C
protons minus neutrons
D
protons
4) Protons are located in the
A
in the nucleus
B
outside the electron cloud and nucleus
C
electron cloud
D
on the edge of the atom
5) The charge of a proton is
A
negative
B
neutral
C
positive
6) The charge of a neutron is
A
positive
B
negative
C
neutral
7) Electrons have a ____________ charge.
A
neutral
B
negative
C
positive
8) The nucleus of an atom has a ______________ charge
A
positive
B
negative
C
neutral
9) The electron cloud of an atom would have a _________ charge.
A
neutral
B
positive
C
negative
10) Which of these is true about an atom?
A
Atoms contain only two subatomic particles, protons and neutrons
B
The electron cloud has a larger mass than the nucleus
C
All atoms contain the same number of valence electrons
D
Protons weigh more than electrons
11) WWhich subatomic particles have no effect on the net charge of an atom?
A
Protons only
B
Protons and electrons
C
Electrons only
D
Neutrons only
12) Which of these could cause an atom to become LESS reactive?
A
Losing neutrons from its electron cloud
B
Gaining electrons in its nucleus
C
Losing electrons from its outer most shell
D
Gaining protons
13) Which of these best describes an atom with 8 valence electrons?
A
Non-reactive
B
Reactive
C
HIghly reactive
14) Which of these atoms would be most reactive?
A
An atom with 1 valence electron
B
An atom with 8 valence electrons
*select an answer for all questions
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