polar covalent, or covalent, and give your reasons: (a) the SiSi bond in Cl3SiSiCl3  (b) the SiCl bond in Cl3SiSiCl3  (c) theCaF bond in CaF2  (d) the NH bond in

mass number for the hafnium isotope with 106 neutrons Express your answer as an integer.

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Draw a Lewis electron-dot symbol for (a) As; (b) Se; (c) Ga.

Which of the following nonmetals will form an ionic compoundwith Sc3+ that has a 1:1 ratio of cations to anions ?(a) Ne (b) F (c) O (d) N

Part A)   Out of the following, the species with a single covalent bond is:   (a)   CO                       (b)   CN-          (c)   Cl2           (d)    N2     Part B)  Which of the following compounds has ionic bonds only? (a)    NH4ClO4                                    (b)    Mg3N2                        (c)    Mg3(PO4)2                  (c)   CHCl3   Part C)   The molecular shape and polarity of xenon tetrafluoride are:   (a)   Tetrahedral & non-polar             (b)   square planar & non-polar (c)    Square pyramidal & polar          (d)   square planar & polar

(a) Use the VSEPR theory to predict the structure of theNNO molecule.(b) The substance NNO has a small dipole moment.Which end of the molecule is more likely to be thepositive end, based only on electronegativity?