Physical Science

• it is the relationship between the weights of reactants and products before, during and following chemical reactions

  Stoichiometry
• An expression that gives the identities and quantities of the substance involved in a reaction.

  Chemical Reaction
• Four main types of chemical reaction, it is known as a direct combination or combination reaction, is a chemical process in which two or more simple elements or compounds combine to form a more complex product. It is represented by the equation: A + B -AB

  Synthesis
• Four main types of chemical reaction, it occurs when one reactant breaks down into two or more products. This can be represented by the general equation: AB- A + B

  Decomposition
• Four main types of chemical reaction, 1 element replaces another in a compound. The basic equation is A + BC- AC + B


  Single Replacement
• Four main types of chemical reaction, it generally takes the form of AB + CD - AD + CB where A and C are positively-charged cations, while B and D are negatively-charged anions

  Double Replacement
• states that gas phased chemicals reaction occurs when molecules colliding have sufficient kinetic energy

  Collision Theory
• is the energy required to proceed reach the transition state

  Activation Energy
• is intuitively defines as how quickly or slowly reaction takes place


  Reaction Rate
• Factors Affecting Chemical Reaction Rate, it usually has a major effect on the rate of chemical reaction. Molecules at a higher ____ have more thermal energy


  Temperature
• Factors Affecting Chemical Reaction Rate, refers to how much solute is dissolved in a solution. The greater concentration, the faster the concentration rate

  Reactant Concentration
• Factors Affecting Chemical Reaction Rate, it is a larger area when a given amount of a solid is present a smaller particles. A powdered reactant has a greater surface area than the same reactant


  Physical state of the reactants and surface area
• Factors Affecting Chemical Reaction Rate, a substance used to facilitate reactions but remain chemically unchanged afterwards


  Presence of catalyst
• are changes affecting the form of a chemical substance, but not its chemical composition.


  Physical Change
• is a process that leads to the chemical transformation of one set of chemical substances to another.


  Chemical Change