Chapter 26 Nuclear

Question 1

If it says find mass difference and they give you the MASS OF ATOM and electrons, what to make sure to do

Answer 1

Mass of atom - mass of electrons to get MASS OF NUCLEUS!!!

Then use standard

Question 2

What is the max BE and you should remember this so you know if the a nucleon is stable or not

Answer 2

9MEV = iron

Remember per nucleon

Question 3

Remember don’t lack when it says bE per nucleons or mass number etc

Question 4

Advantages of fusion over fission (2)

Answer 4

1) fuel much easier to obtain and not finite
2) does not produce toxic and rsdiscotive waste

Question 5

When need to find moles of hydrogen fusing vs moles of uraniums fissioning how to do

Answer 5

As there are two hydrogens reacting , need to do mass / 4! (2 hydrogens per fusion)

For uranium as it is 1 uranium per fission do mass / mr of uranium

Question 6

Correvt wording to way lot of ke needed to fuse?

Answer 6

Needed to be brought to small distances so that string nuckear force can attract as thid only attracts from small distances

However small distances the electrostatic force of repulsion is huge due to them bith havign protoms

So large ke and thus temp needed by EQUATUIN 1.5kt to cause it to happen.

Question 7

Writing ANY nuclear EQUATION, since you like to do with mass numbers, what to ensure for neutrino?

Answer 7

COMPLETLEY unambiguous, so 0,0 mass and charge for it , don’t lack

Question 8

Why when a proton wamte to join itself with a nucleus must it be HIGH SPEED

Answer 8

Thin about the path of the proton - this is basically mini fusion
- the proton needs to get close enough to the nucleus to experience the string nucleus firce.
- however iver small distances the electrostatic force of repulsion is very strong.
- so to overcome this, the proton must have a lot of ke such that it can be in the proximity of the attractive string nucleus rather force