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प्रश्न
Define: Electron
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उत्तर
Electron = e = is subatomic particle revolving around the nucleus of an atom having
unit – ve charge, mass = 1/1840 of 1 hydrogen atom, and the number of electrons = number of protons.
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संबंधित प्रश्न
Which subatomic particle was discovered by : Goldstein ?
Name the subatomic particle whose relative charge is : +1
Why are anode rays also called as 'canal rays'?
Which sub-atomic particle was discovered by Goldstein.
Complete the table given below by identifying P, Q, R and S.
|
Element |
Symbol |
No. of Protons |
No. of neutrons |
No. of Electrons |
|
Sodium |
`""_11^23"NA"` |
11 |
P |
11 |
|
Chlorine |
`""_17^35"CI"` |
Q |
18 |
17 |
|
Uranium |
R |
92 |
146 |
92 |
|
S |
`""_9^19"F"` |
9 |
10 |
9 |
Define: Neutron
Is it possible for the atom of an element to have one electron, one proton and no neutron. If so, name the element.
Assertion: Proton can be defined as a hydrogen ion (H+).
Reason: These photons are produced when one electron is removed from one hydrogen atom.
What are fluorescent materials?
An atom is electrically neutral. Give reason.
