Biology Chapter 2 Practice Exam: Atoms, Bonds, Water & pH Cohesion

Biology Chapter 2 Practice Exam: Atoms, Bonds, Water & pH Cohesion The property of water that allows the molecule to stick to other water molecules. Adhesion The sticking together of particles of different substances. Atom The smallest basic unit of matter Element Substance made of only one type of atom that can not be broken down by chemical means Compound Substance made of atoms of different elements that are bonded together in a particular ratio Ion Atom that has gained or lost one or more electrons Ionic Bond Chemical bond formed through the electrical force between oppositely charged ions Covalent Bond Chemical bond formed when two atoms share one or more electrons Molecule 2 or more atoms held together by covalent bonds Hydrogen Bond Attraction between a slightly positive hydrogen atom and a slightly negative atom Solution Mixture that is consistent throughout, also called an homogeneous mixture Solvent Substance in which solutes dissolve and that is present in greatest concentration in a solution Solute Substance that dissolves in a solvent and is present at a lower concentration than the solvent Acid Compound that donates a proton (H+) when dissolved in a solution Bases Compound that accepts a proton (H+) when dissolved in a solution pH Measure