Elements in the same period generally have
A) different properties.
B) similar properties.
C) similar number of neutrons.
D) similar chemical symbols.
Correct Answer:
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Q128: In which group do all atoms have
Q129: Which of the halogens is a liquid
Q130: Iodine has _ valence electrons.
A)three
B)five
C)seven
D)eight
Q131: Carbon has _ valence electrons.
A)one
B)two
C)three
D)four
Q132: The electrons in the outermost energy level
Q134: Group 2A elements are called
A)alkali metals.
B)alkali earth
Q135: Which element is a halogen?
A)Ba
B)Li
C)Xe
D)F
Q136: Which element has the same number of
Q137: Which element has the same number of
Q138: In which group do all atoms have
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