CHP 2 ATOMS, MOLECULES AND BONDS Define element, atom, compound, molecule, and trace element. ELEMENT: a substance that cannot be broken down to other substances by chemical reactions. COMPOUND: a substance consisting of two or more elements combined in a fixed ratio. MOLECULE: two or more atoms held together by covalent bonds TRACE ELEMENTS: those required by an organism in only minute quantities. Give the mass, charge, and location of each sub-atomic particle. NEUTRON: Mass= 1 Dalton …showed first 75 words of 1105 total…

…showed last 75 words of 1105 total…to the right of the equation Balancing simple equations. **page 34 How do concentrations of reactants and products affect rate? The greater the concentration of reactant molecules, the more frequently they collide with one another and have an opportunity to react to form products. As products accumulate, collisions resulting in the reverse action. Show the development of chemical equilibrium using given rate constants. Chemical equilibrium is reached when the forward and reverse action rates are equal.