The average atomic mass of copper is `63.5`. It exists as two isotopes which are `._(29)^(63)Cu and ._(29)^(65)Cu`. Calculate the percentage of each isotope present in it.

The average atomic mass of copper is 63.5u. It exists as two isotopes which are "_29Cu^63 and "_29Cu^65 . Calculate the percentage of each isotopes present in it.

Naturally occuring boron has two isotopes of masses 10 amu and 11 amu. Calculate the percentage of each isotope if the average atomic mass of boron is 10.2 .

The atomic weight of Cu is 63.546 . There are only two naturally occurring isotopes of copper .^(63)Cu and .^(65)Cu . The natural abundance of the .^(63)Cu isotope must be approximately.

The atomic weight of Cu is 63.546 . There are only two naturally occurring isotopes of copper .^(63)Cu and .^(65)Cu . The natural abundance of the .^(63)Cu isotope must be approximately.

The atomic weight of Cu is 63.546 . There are only two naturally occurring isotopes of copper .^(63)Cu and .^(65)Cu . The natural abundance of the .^(63)Cu isotope must be approximately.