Which of the following is an alkali metal?
A) Al
B) Cl
C) He
D) Na
E) O
Correct Answer:
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Q42: Which element is most likely to have
Q43: How many electrons can occupy the 2s
Q44: Which group contains only metalloids?
A)Ni,Pd,Pt
B)Si,Ge,As
C)Ce,Pr,Nd
D)Kr,Xe,Rn
E)Po,Fr,Ac
Q45: Which element is not a semimetal?
A)Al
B)Si
C)Ge
D)As
E)none of
Q46: Which chemical symbol represents a metalloid?
A)Al
B)B
C)Ga
D)Zn
E)Ar
Q48: Which chemical symbol represents a non-metal?
A)Al
B)B
C)Ga
D)Si
E)P
Q49: Which chemical symbol represents a metallic element?
A)Ar
B)Br
C)Ca
D)H
E)P
Q50: Element Z has the following properties:
A.noncombustible
B.unreactive
C.colorless,odorless gas
Q51: The maximum number of electrons in any
Q52: Which column of the periodic table contains
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