Question #40a52

1 Answer
Nov 1, 2016

Answer:

Isotones are isotopes that have the same number of neutrons but different numbers of protons.

Explanation:

For example, #""_5^12"B"# and #""_6^12"C"# are isotones because they each contain 7 neutrons.

The largest group of stable isotones is

#""_56^138"Ba", ""_57^139"La", ""_58^140"Ce", ""_59^141"Pr" , ""_60^142"Nd", ""_62^144"Sm"#

They are isotones because they all contain 82 neutrons