A) Cu
B) Sc
C) Kr
D) Hg
Answer: B
Explanation: Scandium is represented by the symbol Sc. Its atomic number is 21, the number of protons in its nucleus.
A) Cu
B) Sc
C) Kr
D) Hg
Answer: B
Explanation: Scandium is represented by the symbol Sc. Its atomic number is 21, the number of protons in its nucleus.
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