For Each of the Elements Below, There Are Only Two

question 62

Multiple Choice

For each of the elements below, there are only two naturally occurring isotopes. Using information in your periodic table, identify the pair in which the lighter isotope is the more abundant one.

• A)(⁶Li and ⁷Li)
• B)(⁷⁹Br and ⁸¹Br)
• C)(¹⁰B and ¹¹B)
• D)(¹⁹¹Ir and ¹⁹³Ir)
• E)(⁵⁰V and ⁵¹V)