The Chemical Symbol of Argon Is Ar

question 20

Multiple Choice

The chemical symbol of argon is Ar.An isotope of this element has an atomic number of 18 and a mass number of 38.What are the nuclear symbol,the number of protons,and the number of neutrons of this isotope of argon?
Nuclear symbol Number of protons Number of neutrons

• A) 18 38
• B) 20 18
• C) 38 18
• D) 18 38
• E) 18 20

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