Explanation
After one half life period, the activity of Tritium
becomes 50%
After 2 half life period 25%
After 3 half life period 12.5%
after 4 half life period 6.25%
After 5 half life period 3.12% 3%
It is 5 x 12.5 years + 7 years i.e. approximately 70 years
only
In 2 sec only 90% nuclei are left behind. Thus in next two second 90% of 900 or 810 nuclei will be left.
* Bohr atom model → stationary Orbits * Ionization Potential → Fixed for the atom
* Rutherford atom model → Nucleus
* Thomson atom model → In atom positive and Negative charge are distaibuted uniformly
* Nuclear fusion → generally possible for nuclei low atomic number
* Nuclear fission → generally possible for nuclei high atomic number
* β – decay → Eessentially proceeds by weak nuclear forces.
* Exothermic nuclear reaction → Convets some matter into energy
5 → 4, transition series of paschen which is fall in infrared region
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