Naturally occurring chromium (24Cr) is composed of four stable isotopes; 50Cr, 52Cr, 53Cr, and 54Cr with 52Cr being the most abundant (83.789% natural abundance). Twenty-two radioisotopes, all synthetic, have been characterized, the most stable being 51Cr with a half-life of 27.70 days.
Naturally occurring chromium (24Cr) is composed of four stable isotopes; 50Cr, 52Cr, 53Cr, and 54Cr with 52Cr being the most abundant (83.789% natural abundance). Twenty-two radioisotopes, all synthetic, have been characterized, the most stable being 51Cr with a half-life of 27.70 days.
Source: Wikipedia "Isotopes of chromium" · CC BY-SA 4.0
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