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Class 9 Chemistry Structure Of Atoms


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3. The atomic symbol of a phosphorus ion is given as ^{\wedge} \mathrm{P} 3 \sim (c) Draw the electronic configuration of the ion.
3. The atomic symbol of a phosphorus ion is given as  ^{\wedge} \mathrm{P} 3 \sim (c) Draw the electronic configuration of the ion.

3.TheatomicsymbolofaphosphorusionisgivenasP3(c)Drawtheelectronicconfigurationoftheion.3. The atomic symbol of a phosphorus ion is given as ^{\wedge} \mathrm{P} 3 \sim (c) Draw the electronic configuration of the ion.

12. What are the defects of Rutherfords atomic model?
12. What are the defects of Rutherfords atomic model?

12.WhatarethedefectsofRutherfordsatomicmodel?12. What are the defects of Rutherfords atomic model?

1 . What is the nature of charge on cathode rays?
 1 . What is the nature of charge on cathode rays?

1.Whatisthenatureofchargeoncathoderays? 1 . What is the nature of charge on cathode rays?

Describe the electronic configuration of \mathrm{Na}^{+} \mathrm{Mg}^{2+} and \mathrm{Al}^{3+} ions. Do they have the same number of electrons in the outermost shell?
Describe the electronic configuration of  \mathrm{Na}^{+} \mathrm{Mg}^{2+}  and  \mathrm{Al}^{3+}  ions. Do they have the same number of electrons in the outermost shell?

DescribetheelectronicconfigurationofNa+Mg2+andAl3+ions.Dotheyhavethesamenumberofelectronsintheoutermostshell?Describe the electronic configuration of \mathrm{Na}^{+} \mathrm{Mg}^{2+} and \mathrm{Al}^{3+} ions. Do they have the same number of electrons in the outermost shell?

What do you mean by electronic configuration? What are basic requirements while writing electronic configuration of an element (atom)?
What do you mean by electronic configuration? What are basic requirements while writing electronic configuration of an element (atom)?

Whatdoyoumeanbyelectronicconfiguration?Whatarebasicrequirementswhilewritingelectronicconfigurationofanelement(atom)?What do you mean by electronic configuration? What are basic requirements while writing electronic configuration of an element (atom)?

Example 2.3 An element has 5 electrons in Mshell. Find out its atomic number:
Example  2.3 An element has 5 electrons in Mshell. Find out its atomic number:

Example2.3Anelementhas5electronsinMshell.Findoutitsatomicnumber:Example 2.3 An element has 5 electrons in Mshell. Find out its atomic number:

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