The law of Soddy is an elementary base of the Nuclear physics. Frederick Soddy showed that the emission alpha decreases by two units the atomic number whereas the emission beta increases it by a unit.

Attention, one should not confuse the Loi of Soddy with the Théorème of Soddy.

It is stated as follows: During a nuclear transformation, there is conservation of the Many loads Z and of the Mass number S.A.

• Conservation of the number of loads Z

• Conservation of the number of masses has

One can thus deduce the general formula from it from a disintegration

$\{\}\; \_Z^A\; X\; \backslash \; longrightarrow\; \{\}\; \_\; \{Z-Z^\; \backslash \; premium\}\; ^\; \{A-A^\; \backslash \; premium\}\; Y\; +\; \{\}\; \_\; \{Z^\; \backslash \; premium\}\; ^\; \{A^\; \backslash \; premium\}\; p$
with $X\; \backslash ,$ the core father, $Y\; \backslash ,$ the core wire and $p\; \backslash ,$ the particle emitted by disintegration.

Bonds

• Radioactivity