Which of the following elements is an alkaline earth metal?
A) 38Sr
B) 21Sc
C) 34Se
D) 54Xe
Correct Answer:
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Q46: All of the elements in Group VIIA
Q47: Which of the following pairings is incorrect?
A)
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Q52: Which of the following element-classification pairings is
Q53: In which of the following pairs of
Q54: The number of known nonmetals is _
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Q56: Which column of the periodic table has
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