The electronegativities for the elements vary from 0.7 for cesium to 4 0 for flu

Question

The electronegativities for the elements vary from 0.7 for cesium to 4 0 for fluorine The electronegativity for iodine is 2.5. Based entirely on the general guidelines for electronegativities and bond character, binary compounds with iodine should all be polar covalent with a sigma on I. binary compounds with iodine should all be polar covalent with a sigma+ on I. compounds with iodine may be ionic, polar covalent, or nonpolar covalent no binary compounds with iodine should be substantially ionic Calculate the energy change for the formation of LiCl(s) from its elements in their standard states and the following tabulated information Li(s) + 1/2 Cl_2(g) rightarrow LiCl(s)? Li^+(g) + Cl^-(g) rightarrow LiCl(s) -853 kJ/mol Li(s) rightarrow Li(g) + 159.4 kJ/mol 1/2 Cl_2(g) rightarrow Cl(g) +121.7 kJ/mol Cl(g) + e^- rightarrow Cl^-(g) -348.6 kJ/mol Li(g) rightarrow Li^+(g) + e^- +520.2 kJ/mol +1305.7 kJ/mol +296.9 kJ/mol -400.3 kJ/mol -627.2 kJ/mol Arrange the following spectral regions in order of increasing energy, infrared, microwave, ultraviolet, visible. microwave

Explanation / Answer

13. C

Iodine can form ionic eg:CsI, polar covalent eg:ICl and non polar covalent eg:BI3 compounds depending on nature of combining atoms.

15. A

Energy of electromagnetic radiation is directly proportional to its frequency.

16. D

Energy of electromagnetic radiation is inversely proportional to its wavelength

17. A

Frequency=speed of light÷wavelength

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