BIOL 2130 Lecture Notes - Lecture 3: Surface Tension, Protein Structure, Chemical Polarity
Document Summary
Example of a chemical reaction resulting in a compound, 4h + c ch4 (methane) Chemical reactions: chemical reactions occur when atoms combine with or dissociate from other atoms, atoms are united by chemical bonds, atoms dissociate from other atoms when chemical bonds are broken. Ionic bonds: form when electrons are completely transferred from one atom to another, allow atoms to achieve stability through the transfer of electrons. Ions: result from the loss or gain of electrons, anions have negative charge due to gain of electron(s, cations have positive charge due to loss of electron(s, tend to stay close together because opposite charges attract. Chemical bonds- covalent bonds: covalent bonds, atoms become stable through shared electrons, electrons are shared in pairs, single covalent bonds share one pair of electrons, double covalent bonds share two pairs of electrons. Important for forming intramolecular bonds, as in protein structure.
