# A Nucleus 11NA 24 Emits a Beta Particle to Change into Magnesium (Mg) - Physics

A nucleus ""_11^24Na  emits a beta particle to change into Magnesium (Mg)

(i) Write the symbolic equation for the process.
(ii) What are numbers 24 and 11 called?
(iii) What is the general name of ""_12^24Mg with respect to ""_11^24Na ?

#### Solution

The ""_11^24Na nucleus emits a beta particle and changes into Magnesium.

(i) The above process is represented by the equation

""_11^24Na ->""_12^24Mg +     ""_-1^0e

sodium  Magnesium  Beta particle

(ii) The number 24 is the mass number of the nucleus and 11 is the  atomic number.

(iii)  ""_11^24Na and ""_12^24Mg  are isobars, i.e., ""_12^24Mg  is an isobar of ""_11^24Na   as they have same mass number (protons + neutrons) but different atomic number (protons).

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