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Chemistry
4. Structure of Atom
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Q39 of 149 Page 192

All the gases form cathode rays and anode rays when electricity is passed through them:

(i) What does the formation of cathode rays tell us about the atoms?


(ii) What does the formation of anode rays tell us about the atoms?

(i) The presence of negatively charged electrons in all the atoms is told by the cathode ray formation.

(ii) The presence of positively charged protons in all the atoms is told by the formation of anode rays.


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37

How does a proton differ from an electron?

38

State two observations which show that atom is not indivisible.

40

What do you understand by the tern ‘electronic configuration” of an element? Write down the electronic configuration of oxygen (At. No. = 8).

41

What is the nucleus of an atom and what is the nature of charge on it?

Questions · 149
4. Structure of Atom
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