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Question
What is the significance of the number of protons found in the atoms of different elements?
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Solution
The number of protons in the nucleus of an atom determines the element type of the atom.
Elements are arranged on the bases of number of protons in their respective atoms.
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(b) Explain how, cathode rays are formed from the gas taken in the discharge tube.
(c) What conclusion is obtained from the fact that all the gases from cathode rays?
Goldstein's experiments which involved passing high voltage electricity through gases at very low pressure resulted in the discovery of :
There are two species represented as 35Cl and 37Cl. Which of the following statement is correct regarding these species ?
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 |
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Explain in brief the experimental proof which led to the discovery of –
Protons
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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.
Complete the Table on the basis of information available in the symbols given below
- `""_17^35"Cl"`
- `""_6^12"C"`
- `""_35^81"Br"`
| Element | np | nn |
