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Q.

atomic number of argon

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a

16

b

17

c

18

d

19

answer is C.

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Detailed Solution

Chemical element argon has the atomic number 18 and the symbol Ar. It is a noble gas that belongs to group 18 of the periodic table. At 0.934 percent, argon is the third-most abundant gas in the Earth's atmosphere (9340 ppmv).

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