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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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nevada nevada
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9 years ago
In each of the following radioactive decay processes, supply
the missing particle.

73^Ga--> 73Ge +?

i don't know how to do this question , i don't really understand it, like i know how to do the one with the proton given but not this,

can you please explain the steps to do this,
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#1
Staff Member
Educator
9 years ago
Look at these examples

In each of the following radioactive decay processes, supply the missing particle
a.  60Co → 60Ni + ___
b.  97Tc + ___ → 97Mo
c.  99Tc → 99Ru + ___
d.  239Pu → 235U + ___

Answers:

a.  b (beta, not a b)
b.  b (beta, not a b)
c.  b (beta, not a b)
d.  a (alpha, not an a)
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Mastering in Nutritional Biology
Tralalalala Slight Smile
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#2
Subject Expert
9 years ago
Hi nevada,

You can find the number of proton by looking for those elements in the periodic table (Ga has 31 protons, and Ge has 32).
This looks like Beta- decay, where one of the neutron is converted to a proton and emits an electron is the process.
7331Ga   ---->   7331Ge + e

Hope this helps,
Laser
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#3
Staff Member
Educator
9 years ago
I'm just going to leave the chemistry questions alone lol I suck at them.
Mastering in Nutritional Biology
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nevada Author
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#4
9 years ago
ok so just to make sure i am doing this correct


192^Pt ---> 188^Os +?

i found Pt =78 and Os=76

i got 2e?
 is that correct?

thanks !
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Laser_3Laser_3
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9 years ago
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Hi nevada,

You need to determine which type of decay Pt underwent. Alpha decay is when the mass decrease by 4 and the number of proton decrease by 2. Beta (positive or negative) decay is when the mass stay the same and the number of proton either increase or decrease, the an electron or positron is emitted as a result. Another type of Beta decay is electron capture, which the proton is converted to a neutron. In this case, the mass decrease by 4 and the number of proton decrease by 2, which is an alpha decay:
19278Pt  Rightwards Arrow 18876Os + 42He

In the link is a summary of the most common decay:
http://www.chem.purdue.edu/courses/chm11500.jnash/handouts/decays.pdf (also attached)

Best,
Laser
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