5 Written questions
5 Matching questions
- scientific method
- physical change
- a A change in form without change in composition.
- b A positively or negatively charged atom or group of atoms.
- c A method of solving problems by observation; recording and evaluating data of an experiment; formulating hypothesises and theories to explain the behavior of something.
- d An explanation of the general principles of certain phenomena with considerable evidence to support it; a well established hypothesis.
- e A chemical substance produced from the reactants by a chemical change.
5 Multiple choice questions
- The area of chemistry that deals with the quantitative relationships among reactants and products in a chemical reaction.
- Small discrete increments of energy.
- The rates of effusion of two gases at the same temperature and pressure are inversely proportional to the square roots of their densities or molar masses.
- An ion composed of more than one atom.
- The resistance in a liquid to increase its surface area.
5 True/False questions
vapor-pressure curve → A graph generated by plotting the temperature of a liquid on the x-axis and its vapor pressure on the y-axis. Any point on the curve represents an equilibrium between the vapor and the liquid.
solution → The substance that is dissolved in a solution.
solid → The substance that is dissolved in a solution.
periodic table → An arrangement of the elements according to their atomic numbers. The table consists of horizontal rows, or periods, and vertical columns, or families, of elements. Each period ends with a noble gas.
orbital → An element that is solid at room temperature and whose properties include luster, ductility malleability, and good conductivity of heat and electricity. They tend to lose their valence electrons and become positive ions.