# Radioactive Disintegration Series

**Radioactive Disintegration Series**

Since radioactive disintegration is a continuous process hence a series can be drawn which is known as radioactive disintegration series. There are four such series:

(i) **Thorium series** (4n series) begins with and ends at . [Mass is fully divided by 4]

(ii) **Neptunium series** (4n + 1series) begains with . [here reminder is one]

(iii) **Uranium series** (4n + 2 series) begins with . [here reminder is 2]

(iv) **Actinium series** (4n + 3 series) begins with . [here reminder is 3]

Number of -particles emitted during these series.

Series |
||

4n | 6 |
4 |

(4n+1) | 8 |
5 |

(4n+2) |
8 |
6 |

(4n+3) | 7 |
4 |

Neptunium series is an artificial series while rest are natural series.

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