Tom is studying electronegativity in chemistry class and is asked to place several elements in order from greatest to least amount of electronegativity. He uses the periodic table, as shown, to help him. The elements that Tom must order are: bromine, chlorine, fluorine, iodine.

Answer both questions in the box below:

A) List the four elements in order from greatest to least amount of electronegativity.

B) Explain why these elements have different electronegativities.

A100 kmol/h stream that is 97 mole% carbon tetrachloride (ccl4) and 3% carbon disulfide (cs2) is to be recovered from the bottom of a distillation column. the feed to the column is 16 mole% cs2 and 84% ccl4, and 2% of the ccl4 entering the column is contained in the overhead stream leaving the top of the column. calculate the mass and mole fractions of ccl4 in the overhead stream, and determine the molar flow rates of ccl4 and cs2 in the overhead and feed streams. 12. mw_ccla- 153.82; mw_cs2-76.14.