I'm having trouble working out how to calculate the number of unstable nuclei remaining in a sample after 28 hours, the answer is 10 but I have no idea how its done, any help would be greatly appreciated.
"If a sample of radioactive material initially has 3.7 x 10(^7) unstable nuclei, how...
If oppositely charged particles attract, then why do electrons orbit the nucleus and not stick to it as the nucleus is positively charged and the electrons being negatively charged?
Hi,
I'm stuck on two questions, I gratefull if someone could help me with them, firstly;
(Q1) "A cubical container of volume 0.10m^3 contains a gas at 300K and 1000000Pa. Assuming that the gas is ideal, determine
a) the number of moles of gas present, given that the Universal Gas constant...