Energy Levels And Valence Electrons Question Preview (ID: 11253)
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Using the periodic table of elements, how many valence electrons would helium have?
a) 0
b) 1
c) 2
d) 8
If a particular atom of an element has five protons a neutral atom of this element would have ________ electrons.
a) 0
b) 8
c) 5
d) 3
Valence electrons are important because these are the only electrons involved with an atom's
a) charge
b) nuclear behavior
c) chemical reactivity
d) radioactive properties
What is the atomic number of hydrogen?
a) 1
b) 7
c) 8
d) 9
If an atom gains some extra electrons so that its valence shell becomes full, what happens to the atom?
a) It becomes less stable
b) It becomes more stable
c) Its charge becomes neutral
d) Nothing. It just have more electrons now.
Which of these atoms have a total of fourteen electrons?
a) silicon
b) nitrogen
c) beryllium
d) More information is needed to figure this out
How many valence electrons does a neutral atom of aluminum have?
a) 3
b) 10
c) 13
d) More information is needed to figure this out
If calcium lost two electrons it would have the same number of electrons as
a) argon
b) barrium
c) titanium
d) beryllium
If oxygen gained two electrons how many electrons would be in its outer shell?
a) 2
b) 6
c) 8
d) 19
Which of these elements has the most chemically non-reactive atoms?
a) iron
b) neon
c) lithium
d) bromine
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