All sums from 1 to 15
Dear Student,
Kindly ask different queries in different thread. Also, refer the solution of 10th question.
Radioactivity is the spontaneous emission of energy from unstable atoms. As you know atoms are found in all matter. There are stable atoms, which remain the same always, and unstable atoms, which break down or 'decay' into new atoms. These unstable atoms are said to be 'radioactive', because they emit radioactivity from the nucleus as they decay. The phenomenon of radioactivity is observed in heavy elements such as uranium. Antoine Henri Becquerel, a French scientist discovered radioactivity in 1896 by chance while performing an experiment. So radioactivity refers to the particles which are emitted from nuclei as a result of nuclear instability.
Kindly ask different queries in different thread. Also, refer the solution of 10th question.
Radioactivity is the spontaneous emission of energy from unstable atoms. As you know atoms are found in all matter. There are stable atoms, which remain the same always, and unstable atoms, which break down or 'decay' into new atoms. These unstable atoms are said to be 'radioactive', because they emit radioactivity from the nucleus as they decay. The phenomenon of radioactivity is observed in heavy elements such as uranium. Antoine Henri Becquerel, a French scientist discovered radioactivity in 1896 by chance while performing an experiment. So radioactivity refers to the particles which are emitted from nuclei as a result of nuclear instability.
| NUCLEAR ENERGY | CHEMICAL ENERGY |
| It is obtained due to nuclear reaction between atoms. | It is obtained due to chemical reactions between the atoms. |
| The energy released by using the same amount of material is much more than chemical energy. | The energy released here is lesser in amount than in nuclear reactions. |
| The release of energy forms new atoms than it had stared with. Eg. hydrogen fuses with hydrogen to form helium | The release of energy forms new molecules of atoms which were initially there in the reaction, but no new atom is formed, |