Lecture02-Ch02+Life+Chemistry+and+Energy

Theyformbetweenwatermolecules

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: qual. • Electronegativity—the attractive force that an atomic nucleus exerts on electrons • It depends on the number of protons and the distance between the nucleus and electrons. 11 ELECTRONEGATIVITIES CONCEPT 2.2 ATOMS INTERACT AND FORM MOLECULES • If two atoms have similar electronegativities, they share electrons equally, in what is called a nonpolar covalent bond. • If atoms have different electronegativities, electrons tend to be near the most attractive atom, in what is called a polar covalent bond 12 ELECTRONEGATIVITY COVALENT BOND VS. IONIC BOND 13 CONCEPT 2.2 ATOMS INTERACT AND FORM MOLECULES Hydrogen bonds • Attraction between the δ– end of one molecule and the δ+ hydrogen end of another molecule forms hydrogen bonds. • They form between water molecules. • They are important in the structure of DNA and proteins. Figure 2.5 Hydrogen Bonds Can Form between or within Molecules 14 CONCEPT 2.2 ATOMS INTERACT AND FORM MOLECULES • Water molecules form multiple hydrogen bonds with each other—this contributes to high heat capacity. CONCEPT 2.2 ATOMS INTERACT AND F...
View Full Document

This note was uploaded on 01/31/2014 for the course BSC 2010 taught by Professor Bowes during the Winter '08 term at University of Florida.

Ask a homework question - tutors are online