1.

A di-positive ion has an electronic arrangement 2,8,8 . Find out the number of electrons, protons and neutrons in that element if its mass number is 40.

Answer»

SOLUTION :(i) Calculation of the atomic NUMBER of the element.
(ii) Calculation of the number of electrons in a neutral atom based on the configuration of positive ION.
(III) The atomic number of a neutral atom
(iv) The number of NEUTRONS in a neutral atom based on mass number.
(v) 20,20,20


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