UCI Bio 93- Midterm 1 Latest Version Already Passed

UCI Bio 93- Midterm 1 Latest Version Already Passed smallest unit of chemical elements atoms two or more atoms combined molecules two or more elements combined in a fixed ration compound ... are 4 elements that make up 96% of all living matter C, O, H, N what is the strongest bond? covalent bond sharing of electrons by two atoms covalent transfer of electrons between two atoms ionic what is a weak bond? hydrogen bond the H atom forms one covalent bond and a second weaker bond with an atom in another molecules hydrogen bond equal sharing of electrons (two of the same element) nonpolar unequal sharing of electrons has a charge (water) polar what is the charge of O in water? negative what is the charge of H in water? positive interactions between water molecules (H2O with H2O) cohesion interactions between water and other molecules solvent what is the maximum amount of bonds that hydrogen can form? 4 bonds in room temperature of water what % is the maximum amount of bonds going to be made? 15% when H+ concentration increases... more acidic what H- concentration decreases... more