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Chemical Bonding and Molecular Structure
What is the dipole moment of BF3 or CH4 or CCl4? What do you conclude from this value?
BF3, CH4, and CCl4 molecules: In BF3, three are three BF bonds which are oriented at an angle of 1200 to one another. The three B-F bonds lie in one plane and cancel the dipole moment of one another. Hence, the dipole moment of BF3 would be zero. Similarly, the dipole moments of methane (CH4) and carbon tetrachloride (CCl4) molecules would be zero due to their symmetrical tetrahedral shape.
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Two elements A and B have the electronic configuration as:
A = 1s22s22p63s2 and B = 1s22s22p5
Write the empirical formula of the substance containing A and B.
What type of bonding would you expect between:
(i) a metal and a non-metal
(ii) a non-metal and another non-metal?
Give reasons in one or two sentences for the observation that in their compounds non-metals form anions and not cations.
Out of Na and K, which will form a more stable ionic bond?
Which will have a greater lattice enthalpy: NaCl or MgO?
Is a covalent molecule always formed between two similar atoms?
Why sodium chloride is a solid whereas carbon tetrachloride is a liquid?
Why NaCl gives a white percipitate with AgNO3 solution but CCl4 does not?
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