A) Fe
B) As
C) Ar
D) Sn
Answer: C
Explanation: Argon is represented by the symbol Ar. Its atomic number is 18, the number of protons in its nucleus.
A) Fe
B) As
C) Ar
D) Sn
Answer: C
Explanation: Argon is represented by the symbol Ar. Its atomic number is 18, the number of protons in its nucleus.
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