Question

symbols of two isotopes of an element or 23 x 11 and 2411 if this element contain 65% 26/11 and 35% 2411 to calculate fractional atomic mass of this element​

Answer 1

Answer:

Average atomic mass = F

1

M

1

+F

2

M

2

+...+F

n

M

n

Where F

1

,F

2

,...F

n

is the fraction representing the natural abundance of the isotope and M is the weight of the isotope.

Avg. At. Mass = (0.85×11)+(0.10×12)+(0.05×13)

= 9.35+1.2+0.65

Therefore, the average atomic mass = 11.2