Photoelectric EffectHard
Question
The atomic weight of boron is 10.81 g/mole and it has two isotopes 105B and 115B. The ratio (by number) of 105B : 115B in nature would be :
Options
A.19 : 81
B.10 : 11
C.15 : 16
D.81 : 19
Solution
Let 105B and 115B be in the ratio m:n .
Average atomic weight
10.81 =
⇒
Average atomic weight
10.81 =
⇒
Create a free account to view solution
View Solution FreeMore Photoelectric Effect Questions
A B Ct = 0 N0 0 0 t N1 N2 N3In the above radioactive decay C is stable nucleus. Then:...A source S1 is producing, 1015 photons per second of wavelength 5000 . Another source S2 is producing 1.2 × 1015 ph...De Broglie equation for an electron shows is :...Two balloons are filled one with pure.He gas and the by air respectively.If the pressure and temperature of these baloon...According to Bohr′s theory of the hydrogen atom, the speed vn of the electron in a stationary orbit is related to ...