25) Thorium- 234 decays by alpha emission to form a new nuclide. Identfy the new

Question

25) Thorium- 234 decays by alpha emission to form a new nuclide. Identfy the new nuclide.

A0 radium-228

B) radium-230

C) thorium-232

D) protactinium-230

E) protactinium-234

27) What is the missing symbol in the following nuclear transformation?

6/3 Li + 1/0n -> _____ + 4/2 He

A) 3/1 H

B) 0/1 beta+

C) 3/2He

D) 5/1 H

E) 6/2 HE

28) What product is formed when 235/92 U undergoes 2 alpha emissions and 2 beta emissions in a total of four steps?

A) thorium-231

B) polonium-231

C) actinium-227

D) thorium-227

E) radon-227

29) What type of radioactive decay woule be expected for the unstable nuclide 12/7 N?

A) neutron emission

B) alpha particle emission

C) gamma ray emission

D) beta partcile (electron) emission

E) positron emission

31) What is the missing symbol in the following nuclear transformation?

7/4 Be + 0/-1e- -> ____

A) 7/3 Li

B) 6/3 Li

C) 12/6 C

D) 6/5 B

E) 7/5 B

Explanation / Answer

1. B) radium-230

2.3/1 H

3.D) thorium-227

4.B) alpha particle emission

5.A) 7/3 Li

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