2. Indicate the direction of the polarity for each of the bonds indicated except for all carbon to carbon bonds : F-CH Mg. .CH3 Br H2 `H H

How many electron pairs are shared when a triple bond exists between two carbon atoms? What must he the geometric arrangement around the carbon atoms in a triple bond? Draw the Lewis structure of a simple molecule that contains a triple bond.

Which of the following compounds is a valid Lewis structure of a hydrocarbon? H H-C-Ö-H H HH H-C-N-H H I II H H-C-C-H H III HH H-C-C-H I НН IV I, II, and IV are valid structures of hydrocarbons. Only III is a valid structure of hydrocarbons. All of these compounds are valid structures of hydrocarbons. Only IV is a valid structure of hydrocarbons. III and IV are valid structures of hydrocarbons.

The following represents the two different ways that atoms can be connected for compounds that have the same molecular formula C2H6O. What do we call these two different ways of showing how the atoms are connected?