10) aluminum is a highly reactive metal that oxidizes when exposed to air. which of these would be a good first step in balancing this reaction? al + o2 → al2o3

Match the following vocabulary terms to their definitions. 1. amount of energy required to change 1 gram of material from the solid to the liquid state at its melting point 2. a measure of the kinetic energy of the particles of a substance 3. the amount of heat energy required to raise the temperature of 1 gram of liquid water from 14.5°c to 15.5°c 4. amount of energy required to change 1 gram of material from the liquid to the gaseous state at its boiling point 5. the amount of energy required to change 1 gram of a substance 1°c a. temperature b. latent heat of vaporization c. latent heat of fusion d. calorie e. specific heat

Based on its chemical properties, identify the position of each chemical family on the periodic table.

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?