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gen chem
nuclear phen
| Question | Answer |
|---|---|
| _____ required to break up a nucleus into protons and neutron | binding energy |
| mass defect? | difference b/t mass proton and neutrons relative to mass of nucleus |
| Z | atomic/ proton number |
| A | mass#- proton+neutrons |
| ____ same proton number but different mass number | isotope |
| mass of nucleus is always ______ than the combined mass of protons and neutron | less |
| formula for binding energy | = mass defect x c^2 |
| _______ split nucleus into smaller nuclei | fission |
| _______ combine smaller nuclei into one nucleus | fusion |
| true or false both fusion and fission release energy | True because their initial mass is> than final mass |
| alpha decay | A daughter = A parent -4 (mass#) Z daughter= Z parent -2 |
| beta decay (-e) | A daughter= A parent Z daughter =Z parent +1 (neutron changes to proton) |
| positron decay (+e) | A daughter= A parent Z daughter =Z parent - 1 (proton splits into positron and neutron) |
| _______ cant penetrate lead | alpha |
| gamma decay | A daughter = A parent Z daughter = A parent |
| ______ high energy photons | gamma |
| T1/2 (half life) | time for 1/2 sample to decay |
| gen formula for fraction of remaining nuclei after n half lives | (1/2)^n |
Created by:
smuttz
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