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प्रश्न
In response to a question, a student stated that in an atom, the number of protons is greater than the number of neutrons, which in turn is greater than the number of electrons. Do you agree with the statement? Justify your answer.
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उत्तर
The given statement is not correct. As the number of protons is never greater than the number of neutrons. A number of neutrons can be equal to or greater than a number of protons but a number of protons are equal to a number of electrons for an atom since it is neutral.
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संबंधित प्रश्न
Fill in the blank of the following statement :
The anode rays obtained from hydrogen gas consist of particles called ________
What is a proton? State its relative mass and charge.
Goldstein's experiments which involved passing high voltage electricity through gases at very low pressure resulted in the discovery of :
Why are anode rays also called as 'canal rays'?
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 |
Explain the following:
Mass of an atom is concentrated inside the nucleus of the atom.
Define: Neutron
Represent an electron ‘e’ in term of its symbol showing the subscript and superscript value.
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?
