Question

what is radioactivity?

Give one EXAMPLE..

Write about two limitations of Thomson's model of atom.

Answer 1

radioactivity

..this may help u

thank u

Answer 2

RADIOACTIVITY ---

• the spontaneous emission of radiations from a particular substance or element is known as radioactivity and the elements are known as radioactive elements.
• radioactive rays consists of three different charged particles:-

1. Alpha particle
2. Beta particle
3. Gamma particle

example of radioactive elements is radium (Ra).

LIMITATIONS OF THOMSONN'S MODEL OF ATOM -

1. it does not explain about hydrogen spectrum.
2. it does not explain about Rutherford scattering experiment.
3. it also does not explain about Photoelectric effect .
4. blackboard effect is also not explain by Thomson's model of atom .