The main isotopes of argon found on Earth are 40Ar (99.6%), 36Ar (0.34%), and 38Ar (0.06%). The most abundant isotope of argon is 40Ar. But other planets have different isotopes of argon.
ð ə WORD_BOUNDARY m eɪ n WORD_BOUNDARY aɪ s ə t oʊ p s WORD_BOUNDARY ʌ v WORD_BOUNDARY ɑ ɹ ɡ ɑ n WORD_BOUNDARY f aʊ n d WORD_BOUNDARY ɔ n WORD_BOUNDARY ɜː θ WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY f ɔ ɹ t i WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY n aɪ n t i WORD_BOUNDARY n aɪ n WORD_BOUNDARY s ɪ k s WORD_BOUNDARY p ə ɹ s ɛ n t WORD_BOUNDARY θ ɜː t i WORD_BOUNDARY s ɪ k s WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY z iə ɹ oʊ WORD_BOUNDARY θ ɜː t i WORD_BOUNDARY f ɔ ɹ WORD_BOUNDARY p ə ɹ s ɛ n t WORD_BOUNDARY æ n d WORD_BOUNDARY θ ɜː t i WORD_BOUNDARY eɪ t WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY z iə ɹ oʊ WORD_BOUNDARY z iə ɹ oʊ WORD_BOUNDARY s ɪ k s WORD_BOUNDARY p ə ɹ s ɛ n t WORD_BOUNDARY ð ə WORD_BOUNDARY m oʊ s t WORD_BOUNDARY ʌ b ʌ n d ə n t WORD_BOUNDARY aɪ s ə t oʊ p WORD_BOUNDARY ʌ v WORD_BOUNDARY ɑ ɹ ɡ ɑ n WORD_BOUNDARY ɪ z WORD_BOUNDARY f ɔ ɹ t i WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY b ʌ t WORD_BOUNDARY ʌ ð ə ɹ WORD_BOUNDARY p l æ n ɪ t s WORD_BOUNDARY h æ v WORD_BOUNDARY d ɪ f ɹ ə n t WORD_BOUNDARY aɪ s ə t oʊ p s WORD_BOUNDARY ʌ v WORD_BOUNDARY ɑ ɹ ɡ ɑ n WORD_BOUNDARY