Questions related to the three types of radioactive decay.

I would really appreciate if you would be able to answer one of these questions.

1. Explain how an electron can be released from the nucleus of an atom.

2. Explain- in general what happens during beta decay.

3. Alpha and beta decay are almost always accompanied by __________ ____________.

4. The decay of radioactive elements occurs at ____________ _____________.

5. What is the half life of barium-139?

6. What is the half life of rhodium-106?

7. What is the half life of uranium- 238?

Thank you all

I'm not sure how detailed these need to be, but I'll give it my best shot:

1. An electron is released through beta decay.

2. Beta decay is when a neutron changes to a proton and emits an electron. Neutrons are composed of 2 down quarks and an up quark. One of the down quarks converts to an up quark, changing it to a proton, causing the energy change to be released as an electron.

3. Alpha and beta decay are almost always accompanied by gamma decay

4. I'm not really sure what this question is asking. It could be "the decay of radioactive elements occurs at a constant rate."

5. 83.06 minutes

6. 30.07 seconds

7. 4.47 Gyr (giga years)