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Energy Levels And Valence Electrons
Test Description: Answer the review questions.
Instructions: Answer all questions to get your test result.
1) Using the periodic table of elements, how many valence electrons would helium have?
A
2
B
1
C
8
D
0
2) If a particular atom of an element has five protons a neutral atom of this element would have ________ electrons.
A
3
B
5
C
8
D
0
3) Valence electrons are important because these are the only electrons involved with an atom's
A
charge
B
radioactive properties
C
nuclear behavior
D
chemical reactivity
4) What is the atomic number of hydrogen?
A
8
B
1
C
7
D
9
5) If an atom gains some extra electrons so that its valence shell becomes full, what happens to the atom?
A
It becomes more stable
B
Nothing. It just have more electrons now.
C
It becomes less stable
D
Its charge becomes neutral
6) Which of these atoms have a total of fourteen electrons?
A
silicon
B
More information is needed to figure this out
C
nitrogen
D
beryllium
7) How many valence electrons does a neutral atom of aluminum have?
A
3
B
10
C
More information is needed to figure this out
D
13
8) If calcium lost two electrons it would have the same number of electrons as
A
beryllium
B
barrium
C
titanium
D
argon
9) If oxygen gained two electrons how many electrons would be in its outer shell?
A
19
B
6
C
2
D
8
10) Which of these elements has the most chemically non-reactive atoms?
A
neon
B
lithium
C
iron
D
bromine
*select an answer for all questions
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