(f) Valency of Nitrogen
The atomic number of nitrogen is 7, so its electronic configuration is 2,5. Nitrogen atom has 5 electrons in its outermost shell and it needs 3 more electrons to complete the 8-electron structure. Thus, the nitrogen atom gains 3 electrons to form a nitride ion, , having an inert gas electron configuration of 2,8. Since one nitrogen atom needs 3 electrons to achieve the nearest inert gas electron arrangement, so the electrovalency of nitrogen is 3 (or 3 -).The atomic number of phosphorus is 15, and its valency is also 3.Explain it yourself.
The atoms of inert gases like helium, neon, argon, etc., have completely filled outermost shells,so they can neither lose electrons nor gain electrons. Due to this,inert gases have "zero valency" and are chemically unreactive. We will discuss the covalency now.
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Structure of the Atom - Notes
1. Drawback of Rutherford’s Model of the Atom
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2. Rutherford’s Experiment - Discovery of Nucleus
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3. For the symbols H, D and T,tabulate three sub-atomic particles found in each of them.
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5. Structure of The Atom - Study Points
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10. Arrangement Of Electrons In The Atoms
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13. Limitations of Rutherford's model of the atom
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15. All about Names of the Chemical Elements
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17. How to learn naming Chemical Formulae?
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20. Comparison between Proton, Neutron and Electron
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21. Electronic Configurations of First 20 Elements
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26. Rules for writing of distribution of electrons in various shells for the first 18 elements
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36. The Physical Properties of the Isotopes of an Element are Different
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39. All the Isotopes of an Element Have Identical Chemical Properties
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42. Relationship Between Mass Number and Atomic Number
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44. Valaence Electrons (Or Valancy Electrons)
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45. Electronic Configurations of Noble Gases (or Inert Gases)
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48. Reason for the Fractional Atomic Masses of Elements
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49. Applications of Radioactive Isotopes
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50. Relation Between Valency and Valence Electrons
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