Understanding Electrons Review
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by Amanda Jones
| 21 Questions
1
1
The _____ of an element is determined by the NUMBER of PROTONS in its atom.
2
1
The number of protons equals the _____________.
3
1
Electrons are found flying around in the _________.
4
1
Electrons have a ___________ charge.
5
1
Electrons have _______ mass than protons and neutrons.
6
1
Electrons are arranged around the nucleus into ____________
7
1
the 1st Energy Level holds up to
8 electrons
4 electrons
2 electrons
18 electrons
8
1
the 2nd Energy Level holds up to
8 electrons
4 electrons
2 electrons
18 electrons
9
1
the 2nd Energy Level holds up to
8 electrons
4 electrons
2 electrons
10
1
___________ electrons are the electrons in the outer energy level.
11
1
Valence electrons determine an element's ___________.
12
1
Elements in the same period have the same
number of valence electrons
number of energy levels
chemical properties
13
1
Elements in the same group have the same
number of valence electrons
number of energy levels
luster
14
1
Carbon has _____ valence electrons.
1
2
3
4
5
6
7
8
15
1
Krypton has _____ valence electrons.
1
2
3
4
5
6
7
8
16
1
Calcium has _____ valence electrons.
1
2
3
4
5
6
7
8
17
1
Aluminum has _____ valence electrons.
1
2
3
4
5
6
7
8
18
1
Nitrogen has _____ valence electrons.
1
2
3
4
5
6
7
8
19
1
Sulfur has _____ valence electrons.
1
2
3
4
5
6
7
8
20
1
Iodine has _____ valence electrons.
1
2
3
4
5
6
7
8
21
1
Oxygen has _____ valence electrons.
1
2
3
4
5
6
7
8
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