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6. what replaces an inner shell vacancy
- a proton emitted from the nucleus
- an electron falling from an outer shell
- an electron from the inner shell
7. gamma emission is not written in a decay equation alone as
- it always accompanies alpha or beta emission
- its depressed / likes its own company
- it is irrelevant
8. In positron emission the mass number remains the same and atomic number decreases by 1
9. what does an unstable nucleus do in an attempt to reach a more stable arrangement?
- fusion
- do nothing
- spontaneously decompose
- induced fission
10. beta emission is when a neutron changes to a
- proton and an electron
- neutron and an electron
- electron
- neutron
11. alpha emission decreases
- Mr by 6
- Ar by 6
- mass number by 4 and atomic number 2
- mass number by 2 and atomic number by 4
12. positron emission is when
- proton converts into a neutron and positron
- a positron is captured
- neutron converts to a proton and a positron
- positron converts into a proton and neutron
13. If the number of protons change in radioactive decay ....
- the number of nuetrons also change
- a new element / daughter element is formed
- stays as a parent element
- a son element is formed
14. Alpha particle
- electron neutrino
- lithium nucleus
- helium nucleus
- positron
15. electron capture is when a nucleus absorbs an inner shell electron
16. gamma emission
- is a state of deficient energy
- have mass
- is a state of excess energy
- is made of particles