1.

Which of the following is an isotonic pair

Answer»

`._(19)^(40)K, ._(20)^(40)Ca`
`._(19)^(39)K, ._(20)^(40)Ca`
`._(18)^(33)Ar, ._(18)^(40)Ar`
`._(18)^(40)Ar, ._(20^(40)Ca`

Solution :Isotones have same number of neutrons


Discussion

No Comment Found