Question

list of isotopes of argon
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Answer 1

Answer:

Argon (18Ar) has 26 known isotopes, from 29Ar to 54Ar and 1 isomer (32mAr), of which three are stable (36Ar, 38Ar, and 40Ar). On the Earth, 40Ar makes up 99.6% of natural argon. The longest-lived radioactive isotopes are 39Ar with a half-life of 269 years, 42Ar with a half-life of 32.9 years, and 37Ar with a half-life of 35.04 days. All other isotopes have half-lives of less than two hours, and most less than one minute. The least stable is 29Ar with a half-life of approximately 4×10−20 seconds.[2]

Main isotopes of argon

(18Ar)

Iso­tope Decay

abun­dance half-life (t1/2) mode pro­duct

36Ar 0.334% stable

37Ar syn 35 d ε 37Cl

38Ar 0.063% stable

39Ar trace 269 y β− 39K

40Ar 99.604% stable

41Ar syn 109.34 min β− 41K

42Ar syn 32.9 y β− 42K

Answer 2

Answer:

Argon (18Ar) has 26 known isotopes, from 29Ar to 54Ar and 1 isomer (32mAr), of which three are stable (36Ar, 38Ar, and 40Ar). On the Earth, 40Ar makes up 99.6% of natural argon. The longest-lived radioactive isotopes are 39Ar with a half-life of 269 years, 42Ar with a half-life of 32.9 years, and 37Ar with a half-life of 35.04 days. All other isotopes have half-lives of less than two hours, and most less than one minute. The least stable is 29Ar with a half-life of approximately 4×10−20 seconds.[2]

Main isotopes of argon

(18Ar)

Iso­tope Decay

abun­dance half-life (t1/2) mode pro­duct

36Ar 0.334% stable

37Ar syn 35 d ε 37Cl

38Ar 0.063% stable

39Ar trace 269 y β− 39K

40Ar 99.604% stable

41Ar syn 109.34 min β− 41K

42Ar syn 32.9 y β− 42K

Explanation: