Class 11ChemistryStructure of AtomDiscovery and Properties of anode, cathode rays neutron and Nuclear structure
DifficultProvide general information about the fundamental particles of an atom.
(N/A) The fundamental particles of an atom are the electron,proton,and neutron. Their characteristics are summarized in the table below:
| Properties | Electron | Proton | Neutron |
| Symbol | $e$ or ${}_{-1}e^{0}$ | $p$ or ${}_{1}^{1}p$ | $n$ or ${}_{0}^{1}n$ |
| Absolute charge $(C)$ | $-1.6022 \times 10^{-19}$ | $+1.6022 \times 10^{-19}$ | $0$ |
| Relative charge | $-1$ | $+1$ | $0$ |
| Mass $(kg)$ | $9.10939 \times 10^{-31}$ | $1.67262 \times 10^{-27}$ | $1.67493 \times 10^{-27}$ |
| Mass $(u)$ | $0.00054$ | $1.00727$ | $1.00867$ |
| Approx Mass $(u)$ | $0$ | $1$ | $1$ |
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Similar Questions
Fill in the blanks:
$(i)$ $R. A. Millikan$ developed the ......... method to determine the charge of an electron.
$(ii)$ The positively charged particles in a modified cathode ray tube are called ............ .
$(iii)$ The smallest and lightest positive ion obtained from hydrogen is ........... .
$(iv)$ In the year $1932$,$Chadwick$ discovered ........... .
$(i)$ $R. A. Millikan$ developed the ......... method to determine the charge of an electron.
$(ii)$ The positively charged particles in a modified cathode ray tube are called ............ .
$(iii)$ The smallest and lightest positive ion obtained from hydrogen is ........... .
$(iv)$ In the year $1932$,$Chadwick$ discovered ........... .
Easy
View SolutionThe radius of a nucleus with mass number $A$ is given by $1.25 \times 10^{-13} \times A^{1/3} \ cm$. If the radius of the atom is $1 \ \mathring{A}$ and the mass number is $64$,calculate the fraction of the volume occupied by the nucleus.
Difficult
View SolutionThe penetration power of a proton is:
Easy
View SolutionWho discovered the neutron?
The ratio of specific charge of a proton and an $\alpha$-particle is
Medium
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