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 . you.

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



 neon
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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?

0 days >>> 1.00g
14,3 days >>> 1.00g :2 = 0,5g
(14.3+14.3) days >>> 0.5g : 2 = 0.25g
(14.3+14.3+14.3) days >>>  0.25g : 2 = 0.125g 

0.125g
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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



6 electrons  (so it's beta⁻)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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.  

at the beginning >>> 0.20g
1 half-live >>> 0.20g : 2 = 0.10g
2 half-live >>> 0.10g : 2 = 0.05g
3 half-live >>> 0.05g : 2 = 0.025g

0.025g
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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?

0 s (at the beginning) >>> 48mg
30s >>>>>>>>>>>>>>> 48mg : 2 = 24mg
(30+30)s >>>>>>>>>>> 24mg : 2 = 12mg
(30+30+30)s >>>>>>>> 12mg : 2 = 6mg
(30+30+30+30)s >>>>> 6mg : 2 = 3mg

30+30+30+30 = 120s
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
What radionuclide decays to Fe-56 by beta emission?



 ⁵⁶₂₇Co
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The Cf to Cf conversion is accompanied by __________.

Cf to Cf ????  maybe...mistake?

What are the choices?