What is an example of a positron decay practice problem?

1 Answer
Feb 14, 2016

Answer:

Here are five practice problems.

Explanation:

Two points to remember about positron decay:

  1. It emits a positron and a neutrino.
  2. The atomic number decreases by one, and the mass number is unchanged.

Here is an example of a positron decay equation:

#""_12^23"Mg" → ""_11^23"Na" + ""_1^0"e" + ""_0^0ν#

Practice problems

Complete the following positron decay equations.

(a) #""_35^75"Br" → "?" + ""_1^0"e" + ""_0^0ν#

(b) #"?" → ""_14^30"Si" + ""_1^0"e" + ""_0^0ν#

(c) #""_14^27"Si" → "?" + ""_0^0ν#

(d) #"?"→ ""_21^45"Sc" + "?"#

(e) #""_5^8"B" → "?"#

Solutions

(a) #""_35^75"Br" →"" _34^75"Se" + ""_1^0"e" + ""_0^0ν#

(b) #""_15^30"P" → ""_14^30"Si" + ""_1^0"e" + ""_0^0ν#

(c) #""_14^27"Si" → ""_13^27"Al" + ""_1^0"e" + ""_0^0ν#

(d) #""_22^45"Ti" → ""_21^45"Sc" + ""_1^0"e" + ""_0^0ν#

(e) #""_5^8"B" → ""_4^8"Be" + ""_1^0"e" + ""_0^0ν#