The properties of electrons, protons and neutrons-
| Practile | Nature of Charge | Mass | Location |
|---|---|---|---|
| Electron | Electrons are negatively charged. | \(9 \times 10^{–31}\) kg | Extra nuclear part distributed in different shell or orbits. |
| Proton | Protons are positively charged. | \(1.672 \times 10^{–27}\) kg (1 µ) (approx. 2000 times that of the electron) | Nucleus |
| Neutron | Neutrons are neutral. | Equal to mass of proton | Nucleus |
Length (in hours) | Number of lamps |
|---|---|
300 − 400 | 14 |
400 − 500 | 56 |
500 − 600 | 60 |
600 − 700 | 86 |
700 − 800 | 74 |
800 − 900 | 62 |
900 − 1000 | 48 |
(i) Represent the given information with the help of a histogram.
(ii) How many lamps have a lifetime of more than 700 hours?
Why was Santosh sent to the local school?