Bombarding sodium-23 with a
proton produces nuclide X and a neutron. What is nuclide X?








Answers:



magnesium-24





magnesium-23





neon-23




s
odium-24





none of the above




The isotope P
has a half-life of 14.3 days. If a sample originally contained 1.00 g of P,
how much was left after 43 days?






Answers:


0.250 g





0.125 g





0.750 g





0.500 g




Identify X in the reaction
below.
 U
+  C
→  Cf
+ X







Answers:



1
alpha particle





3
protons





6
neutrons





6
electrons






A .20 gram sample of C-14 was allowed to decay for 3 half-lives.  What mass
of the sample will remain?  Carbon-14 has a half life of 5730
years.  






Answers:



0.025






0.05






0.1





0
.01






0.05






The isotope Cu
has a half-life of 30 s. If a sample originally contained 48 mg of Cu,
how much time passed before the amount fell to 3 mg?


Answers:



120 s





240s



30 s





60 s(when I did my calculation for the question above, I got 60 seconds)



What radionuclide decays to Fe-56
by beta emission?








Answers:


 Fe





 Co





 Mn





 Co





 MnHow do I know wat it becomes. I put 57 Co 27 and it's wrong.



The Cf
to Cf
conversion is accompanied by __________.







Answers:



an alpha
emission





a
neutron capture





an electron
capture





an electron releaseI would greatly appreciate your help...ASAP. Thank you.