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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
5
C
0
D
7
3) The mass number of Carbon represents the total number of
A
neutrons
B
protons plus neutrons
C
protons
D
protons minus neutrons
4) Protons are located in the
A
in the nucleus
B
electron cloud
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
positive
B
negative
C
neutral
7) Electrons have a ____________ charge.
A
positive
B
negative
C
neutral
8) The nucleus of an atom has a ______________ charge
A
positive
B
neutral
C
negative
9) The electron cloud of an atom would have a _________ charge.
A
negative
B
positive
C
neutral
10) Which of these is true about an atom?
A
All atoms contain the same number of valence electrons
B
Atoms contain only two subatomic particles, protons and neutrons
C
Protons weigh more than electrons
D
The electron cloud has a larger mass than the nucleus
11) WWhich subatomic particles have no effect on the net charge of an atom?
A
Protons only
B
Neutrons only
C
Protons and electrons
D
Electrons only
12) Which of these could cause an atom to become LESS reactive?
A
Gaining electrons in its nucleus
B
Gaining protons
C
Losing electrons from its outer most shell
D
Losing neutrons from its electron cloud
13) Which of these best describes an atom with 8 valence electrons?
A
Reactive
B
Non-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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