beta +or- decay.

[jjw822]

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I have question about beta decay...

from physics class i know there is + and - beta decay...

but i am confused..

for example from destroyer Gchem #40

a nuclide 225,90 Th underwent 3 alpha decays, 4 beta decays and a gamma decay. what is the resulting nucleus?

answer says beta decay - mass is unchanged and atomic number increased by 1. HOW DO WE KNOW IF IT IS + OR - DECAY???

 

[Daydream46]

I have question about beta decay...

from physics class i know there is + and - beta decay...

but i am confused..

for example from destroyer Gchem #40

a nuclide 225,90 Th underwent 3 alpha decays, 4 beta decays and a gamma decay. what is the resulting nucleus?

answer says beta decay - mass is unchanged and atomic number increased by 1. HOW DO WE KNOW IF IT IS + OR - DECAY???

Pretty sure you assume - unless it specifically says +

 

[doc3232]

Pretty sure you assume - unless it specifically says +

I second that.

 

[jjw822]

OK thanks!!!

 

[Chesnok]

Beta decay it's like a synonym for electron decay even tho u may have a positron decay which is also beta but decrease atomic number.
Good luck