ICSE Class 9 Answered
(A) 24/12 Mg and 26/12 Mg are two symbols of isotopesof magnesium.
give reason why this isotope of magnesium have different mass number.
Compare the atoms of these isotopes with respect to:
composition of nuclei.
the electronic configuration
Asked by chitranshranjan178 | 14 Sep, 2015, 06:46: PM
Expert Answer
Mass number = number of protons + number of neutrons
In 24/12 Mg there are 12 protons and 12 neutrons, hence the mass number of this isotope is 24.
In 26/12 Mg, there are 12 protons and 14 neutrons, hence the mass number of this isotope is 26.
Answered by | 14 Sep, 2015, 06:53: PM
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