AI+A11Y 11MAY2024 HYDERBAD GAAD 2024 - HelloA11Y (11 May 2024)
Chemical bonding by Ms Rashmi Bhatia
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9. Electronic Configuration of first twenty elements.. Atoms tend to gain or lose their outer electrons to achieve a ‘full’ valence shell. INERT- GAS CONFIGURATION The outermost shell of the noble gas atoms are completely filled due to the presence of eight electrons (two in case of Helium).
10. Just as a summary to what each bond looks like…
27. We are going to look at Polar Covalent now… What is polar covalent bond? - Polar covalent is a description of a bond that has an uneven distribution of charge due to an unequal sharing of bonding electrons. The boy is not equally sharing with anyone else but rather taking all the food for himself.
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29. Polar Covalent Bond One atom is more electronegative than the other. Example: water molecule
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32. 4 ) Electrical Conductivity : The conductance through metals is because of movement of valence electrons. Since movement of ions and ionic solids is not possible due to the rigid structure, ionic compounds in the solid state either do not conduct electricity or are poor conductors. However, in the molten state or aqueous solution, ionic compounds conduct electricity due to mobility of ions.
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34. generally low, as less energy is required to overcome these weak forces. 4) Electrical Conductivity : covalent compounds are poor conductors of electricity because they neither contain the ions nor the free electrons necessary for conduction. For example, Hydrogen Chloride gas i.e. HCl (g) is a poor conductor of electricity. But in water, it changes into hydrochloric acid i.e. HCl(aq). Since the acid can ionise in solution to form H+ and Cl- ions, it becomes a good conductor of electricity.
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