Two isotopes of Copper are 63Cu, 65Cu and relative atomic mass is 63.5. Determine the percentage of the two isotopes. [Dinajpur Board-2021]
1H, 2H and 3H are three isotopes of hydrogen atom. Naturally available percentage of first isotope is 99.98% and average relative atomic mass of that element is 1.00025. Calculate the percentage of 2nd and 3rd isotopes are available in nature. [Dhaka Board - 2021]