I will rate u 5 if u give me an explaination Which particle has the same mass as
ID: 710643 • Letter: I
Question
I will rate u 5 if u give me an explaination
Which particle has the same mass as a beta particle? a positron a proton a Gamma ray an alpha particle a neutron the rate constant tor the decay of a radioactive isootope is 4.226 x 10-3 / day. What is the half-life of of this isotope? 82.00 days 164.0 days 328.0 days 410.0 days none of these The half-life of 42K is 12.5 h. How much will remain after 81 h if the original sample contained 256 g of 42K? 17 g 22 g 19 g 2.9 g 11g 55Mn can be prepared by electron capture from which of the following? 55 Fe 51V 57Co 56Mn 55Cr Which particle does the nuclide symbol a represent? helium nucleus positron electron proton Gamma photon Relative to the sum of the masses of its constituent nucleons (neutrons + protons), the mass of a nucleus is always smaller. always the same. sometimes the same and sometimes smaller. always greater. sometimes greater and sometimes smaller.Explanation / Answer
a) beta particle has mass equal to that of electron similar as positron.
b)half life = ln 2/ lambda = 0.693/(4.226*10^-3) = 163.98 days
c)half life = 12.5 hours lambda = ln2 / half life = 0.693/12.5 = 0.05544 hr-1
N = N0 e^(-lambda *t)Â
N = 256(e^(-0.05544*81)) = 2.87 gms
d)option d Mn 56 as it capture electron the no.of protons = 56-1 = 55
e)helium nucleus
f)sometimes same and sometimes smaller
as some mass might be lost in keeping the nucleus together