1.Write out the electron structure for the element osmium, Os, (atomic number 76) using the s, p, d, f notation.2.Use the electronegativity values below to predict the type of bonding most likely to...

1.Write out the electron structure for the element osmium, Os, (atomic number 76) using the s, p, d, f notation.2.Use the electronegativity values below to predict the type of bonding most likely to be found in the following compounds and comment on your answers.(a) Na2O (b) H2O (c) F2O (b)HF Na = 0.9; O = 3.5; H = 2.1; F =4.03.Draw Lewis structures for the following molecules:(a)SO2 (b) HCN (c) BrF34.Explain why phosphorus pentafluoride, PF5, is a stable and well-known molecule but the very similar molecule, NF5, where the phosphorus is replaced by nitrogen, does not exist.5.Draw a Lewis structure for the methanoate (formate) anion, HCOO-. What do you think the true structure of this ion is? Does this explain why it is relatively stable compared to many anions, e.g. CH3O- ?6.Cylcopentadiene, C5H6, is made up of a five membered ring of carbon atoms, four of which have one hydrogen attached, the fifth having two hydrogens. (a) Draw a Lewis structure for thismolecule.(b) Cylcopentadiene can be readilydeprotonated (removing an H+ ion) to form the anion C5H5-. By considering the delocalization possible in this anion, explain why the molecule so readily loses the H+ ion.7.Using VSEPR theory, determine the shapes of the following molecules:(a)NCl3 (b) SCl4 (c) SO38.In the first practical you examined the physical properties of various chemical substances. I have reproduced the results that you should have obtained for the three unknowns. Explain what you can conclude about each, especially whether they are ionic or covalent compounds.unknown effect of heating in a steam bath solubility in H2O solubility inpetroleum ether or hexane pHA Solid - No change Soluble Insoluble NeutralB Solid - No change Insoluble Insoluble AcidC Liquid – boils away Soluble Soluble NeutralThe following questions test your skill at naming and drawing molecules. Names given must be unambiguous and systematic. Drawings (only one needed for each part of question 10) may be any of the three standard types, i.e., skeletal, structural(aka displayed) or condensed, but NOT Lewis structures, here’s a reminder: 9. Name the following compounds: (a) (c) CH3HCCH H3C33 3 H3C(b) (d) CHCH3OHH3CH3CCH3 O CH3 10. Give structures for the following: (a) 2-aminobutane(b) 3-methylhex-1-ene(c) 2,2-dimethylpentane(d) 3-hydroxypropanoic acid