Question

An element contain two neutral occurring isotopes 35 by 17 and 37 by Sajid if the average atomic mass of this element be 35.5 you unit calculate the percentage of two isotopes

Answer 1

Answer:let percentage of  isotope with mass number 35 is x% and with mass no 37 is (100 - x)%

so average atomic mass = 35*x+37*(100-x)/100 and this will be equal to 35.5

Explanation: 35x + 3700 -37x=3550

3700-2x= 3550

2x= 150

x= 75

so percentage of isotopes with atomic no 35 is 75% and with mass no 37 is 25%.