An 'alpha particle' is the same thing as the nucleus of a helium atom ...
a little bundle made of 2 protons and 2 neutrons
.A 'beta' particle is an electron.
The mass of an alpha particle is more than 7,000 times the mass of an electron, so it certainly takes more energy to get it moving.
The ideal gas law formula is: PV=nRT. As the n(moles of gas), R(Gas constant) and T(temperature) values are constant as it is given in the problem, we can calculate the pressure difference by the following formula: xΔP(difference factor of pressure)=1/xΔV. We can find the difference factor of volume by x=V(0)/v(1),
x=18l/2l=9 which means the pressure is 9 times greater after the volume is down to 2l. To find the final pressure, we can use P(1)=xP(0), when we add the numbers in, it looks like this: P(1)=9*42 kPa=378 kPa
The answer is (1).
Quantum mechanics views electron orbitals not as fixed circular paths or defined boundaries, but as probablility distributions that represent the probability of finding an electron at any point in space around the nucleus. For simplicity, discrete "boundaries" are often drawn enclosing the area where electrons should be found 90% of the time.
Following Aufbau rule and Hund principle, the order of filling of the orbitals is this:
So, the first, second, and fourth option are not correct.
The third option does meet the filling order.
Answer:
