Parts A and B The figure is a representation of fifty atoms of a fictitious elem
ID: 484824 • Letter: P
Question
Parts A and B
The figure is a representation of fifty atoms of a fictitious element with the symbol Nt and atomic number 120 Nt has three isotopes represented by the following colors: Nt - 304 (red) Nt - 305 (blue), and Nt - 300 (green). Assuming that the figure is statistically representative of naturally occurring Nt, what is the percent natural abundance of each Nt isotope? Express your answers using two significant figures. Enter your answers numerically separated by commas. Use the following masses of each isotope to calculate tic atomic mass of Nt. Nt-304 303.955 amu Nt-305 304 902 amu Nt-306 305.975 amu Express your answer using four significant figures.Explanation / Answer
n = 50 atoms
Z = 120
304,305,306...
A)
natura abundance:
n = 50 molecules
n-305(blue) = 2
n-306(green) = 12
n-304(red) = 50-2-12 = 36
now..
%-305 = 2/50 *100 = 4%
%-306 = 12/50 *100 = 24%
%-304 = 36/50 *100 = 72%
B)
Calculate average mass:
MW avg = X1*MW1 + X2*MW2 + X3*MW3
MWavg = (4/100)*304.962 + 24/100*305.978 + 72/100*303.956 = 304.48152 amu
for 4sig fig --> 304.5