Posted by **Jessie** on Tuesday, April 19, 2011 at 8:35pm.

In a series of decays (hypothetical), the nuclide Ra-227 beomes Pb-203. How many alphas and how many betas are emitted in this series? Give two answers: first, give the number of alpha decays; then, the number of beta decays.

I know that there are 6 alpha decays happening. I just do not get the beta decay part.

- chemistry (NEED HELP) -
**DrBob222**, Tuesday, April 19, 2011 at 10:13pm
88Ra227 ==> 2He4 + ?X?

227-203 = 24; therefore, the number of 2He4 must be 6 since 6x4 = 24. That lets us assign ?values to X. The number of protons must be 88-12 = 76 which is Os so the full equation with alpha particles is

88Ra227 --> 6*2He4 + 76Os203. Now to assign the beta particles.

We want to go from element 76 to element 82; therefore, we need 82-76 = 6. Then

76Os203 ==> 6*-1e0 + 82Pb203

- chemistry (NEED HELP) -
**Jessie**, Tuesday, April 19, 2011 at 11:01pm
THANK YOU SO MUCH

## Answer this Question

## Related Questions

- chemistry (need some help) - In a series of decays (hypothetical), the nuclide ...
- Chemistry - In a series of decays (hypothetical), the nuclide Ra-227 beomes Pb-...
- CHEM - the nuclide 232 Th 90 is radioactive. when one of the atoms decays, a ...
- Nuclear Chem - the nuclide 232 Th 90 is radioactive. when one of the atoms ...
- chem - Write a partial decay series for Rn-220 undergoing the following ...
- Calc II - Use the comparison or limit comparison test to decide if the following...
- Chemistry - The radioactive nuclide 18F decays by first order kinetics with a ...
- calculus - Consider ∞ ∑ [(3k+5)/(kČ-2k)]ᵖ, for each p ∈...
- Algebra 2 - I need steps on how to complete this please i am so confused and ...
- math - the "k"th term of a series, Sk=a 1-r^k/1-r, is the sum of the first "k" ...

More Related Questions