7.1.d protons v neutron graph, half life

Which statements can be said about this graph of number of neutrons against number of protons

• there are usually more neutrons than protons

• there are usually more protons than neutrons

• beta emitters lie above the stability line

• beta emitters lie below the stability line

• some elements have the same number of protons as neutrons

In gamma emission how are do A and Z change?

• A remains the same

• Z increases by 1

• X changes to another letter (element)

• A decreases by 4

• Z reduces by 4

In beta decay how are do A and Z change to make the product?

• A remains the same

• Z increases by 1

• X changes to another letter (element)

• A decreases by 4

• Z reduces by 4

What is the half life of this isotope?

• 2 mins

• 4 mins

• 6 mins

• 8 mins

• 50 mins

What is the half life of this isotope?

• 2 hours

• 4 hours

• 6 hours

• 8 hours

• 10 hours

How long will it take for the count to go down to 250 counts per minute?

• 32 days

• 40 days

• 48 days

• 56 days

• 24 days

What will be the radioactive count after 28 days?

• 2000

• 1500

• 1000

• 750

• 500

With a beta emitter (turquoise region), how does the element move on this graph after beta emission?

• down

• up

• to right

• to left

• stays where it is

With a alpha emitter (yellow region), how does the element move on this graph after alpha emission?

• down

• up

• to right

• to left

• stays where it is

With a gamma emitter, how does the element move on this graph.

• down

• up

• to right

• to left

• stays where it is