Grade 9 Science Chemistry Exam Review PDF

Grade 9 Science **[EXAM REVIEW -- CHEMISTRY]** **Use your notebook and the textbook to complete all of the following review questions.** **Please note that your notebook and associated textbook page references are the [BEST] study tools. These questions will only help to reinforce some of the exam...

Grade 9 Science **[EXAM REVIEW -- CHEMISTRY]** **Use your notebook and the textbook to complete all of the following review questions.** **Please note that your notebook and associated textbook page references are the [BEST] study tools. These questions will only help to reinforce some of the exam topics.** 1.. Complete the following table using your knowledge of the Particle Theory of Matter: +---------+---------+---------+---------+---------+---------+---------+ | STATE | FORCES | SPACING | MOVEMEN | SHAPE | VOLUME | DIAGRAM | | of | OF | OF | T | (defini | | | | MATTER | ATTRACT | MOLECUL | OF | te | (defini | | | | ION | ES | MOLECUL | or | te | | | | | | ES | indefin | or | | | | | | | ite) | indefin | | | | | | | | ite) | | +=========+=========+=========+=========+=========+=========+=========+ | solid | Strong | Tightly | Vibrati | definit | definit | Solid: | | | | packed | ng | e | e | vibrati | | | | in a | in | | | ng | | | | pattern | place | | | lattice | +---------+---------+---------+---------+---------+---------+---------+ | liquid | Weak | Spread | Moving | indefin | definit |  | +---------+---------+---------+---------+---------+---------+---------+ | gas | Very | Very | Moving | indefin | indefin | Gas: | | | weak | far | very | ite | ite | free | | | | apart | quickly | | | motion | +---------+---------+---------+---------+---------+---------+---------+ 2\. Changes of state are examples of physical changes. a\) Complete the following diagram with labels and arrows to show all of the SIX changes of state. b\) For each change of state identify whether in the process of the change of state, energy has been released (exothermic reaction) or absorbed (endothermic reaction).  3\. Name FIVE ways in which you know a chemical change has probably taken place. - - - - - - 4\. Identify each of the following examples as either physical (P) or chemical changes (C): a\) clothes dried in an electric dryer P d\) wood burning C ------------------------------------------ --- --------------------------------------- --- b\) clothes dried while hanging outdoors P e\) frost forming on a car windshield P c\) hamburger is cooked C f\) a penny tarnishes C 5\. What is the volume indicated by each of the graduated cylinders below? a\) b) c) d) V = 6.3mL V = 16.2 mL V = 33 mL V = 145 mL =6.3 cm^3^ = 16.2 cm^3^ = 33 cm^3^ = 145 cm^3^ 6\. a) Identify the following substances as pure substances or mixtures. b\) Once you have completed a), identify the type of mixture or pure substance each substance is. Pure Substance or Mixture Specific Type of Mixture / Pure Substance -------------------------- --------------------------- ------------------------------------------- i\) raisin bran cereal mixture mechanical mixture ii\) shaving cream mixture mechanical mixture iii\) pure water pure substance compound iv\) nail polish remover mixture solution v\) salt pure substance compound vi\) oxygen pure substance element vii\) muddy water mixture mechanical mixture 7\. Complete the following chart on the Classification of Matter. 8\. For each chemical formula: a\) state the number of atoms of each element that make up the formula b\) state the total number of atoms in the formula +-----------------------+-----------------------+-----------------------+ | | Number of atoms of | Number of atoms in | | | each element | the molecule | +=======================+=======================+=======================+ | H~2~O | Hydrogen - 2 | 3 | | | | | | | Oxygen - 1 | | +-----------------------+-----------------------+-----------------------+ | NaCl | Sodium - 1 | 2 | | | | | | | Chlorine - 1 | | +-----------------------+-----------------------+-----------------------+ | MgCO~3~ | Magnesium - 1 | 5 | | | | | | | Carbon - 1 | | | | | | | | Oxygen - 3 | | +-----------------------+-----------------------+-----------------------+ | K~2~CO~3~ | Potassium - 2 | 6 | | | | | | | Carbon - 1 | | | | | | | | Oxygen - 3 | | +-----------------------+-----------------------+-----------------------+ | CH~4~ | Carbon - 1 | 5 | | | | | | | Hydrogen - 4 | | +-----------------------+-----------------------+-----------------------+ 9\. Complete the following paragraphs on the atom. Matter is made up of small particles called atoms. There are smaller pieces that make up atoms called subatomic particles, of which there are three types; protons, electrons and neutrons. Most of the mass of the atom is located in its core called the nucleus which contains neutrons which are neutral (no charge) and protons which are positively charged. Electrons, which are negatively charged, are thought to move around the core in orbits. If an atom is electrically neutral, it has equal numbers of protons and electrons. Sometimes atoms gain or lose electrons. If an atom gains electrons, its net charge will be negative and if it loses electrons, its net charge will be positive. A charged atom is called an ion. 10\. Using the Periodic Table of Elements in your textbook, complete the following table: +--------+--------+--------+--------+--------+--------+--------+--------+ | Elemen | Symbol | Mass | Atomic | \# of | \# of | \# of | net | | t | of | Number | Number | electr | | | charge | | Name | Atom | | | ons | proton | neutro | | | | | | | | s | ns | | +========+========+========+========+========+========+========+========+ | oxygen | {. | 16 | 8 | 8 | 8 | 8 | 0 | | | math | | | | | | | | |.inlin | | | | | | | | | e}/8 | | | | | | | | | O | | | | | | | +--------+--------+--------+--------+--------+--------+--------+--------+ | sulfur | [\${\\ | 32 | 16 | 14 | 16 | 16 | 2+ | | | frac{3 | | | | | | | | | 2}{16} | | | | | | | | | S}\^{2 | | | | | | | | | +}\$]{ | | | | | | | | |.math | | | | | | | | |.inlin | | | | | | | | | e} | | | | | | | +--------+--------+--------+--------+--------+--------+--------+--------+ | calciu | [\${\\ | 40 | 20 | 18 | 20 | 20 | 2+ | | m | frac{4 | | | | | | | | | 0}{20} | | | | | | | | | \\text | | | | | | | | | {Ca}}\ | | | | | | | | | ^{2 | | | | | | | | | +}\$]{ | | | | | | | | |.math | | | | | | | | |.inlin | | | | | | | | | e} | | | | | | | +--------+--------+--------+--------+--------+--------+--------+--------+ | beryll | [\$\\f | 9 | 4 | 4 | 4 | 5 | 0 | | ium | rac{9} | | | | | | | | | {4}\\t | | | | | | | | | ext{Be | | | | | | | | | }\$]{. | | | | | | | | | math | | | | | | | | |.inlin | | | | | | | | | e} | | | | | | | +--------+--------+--------+--------+--------+--------+--------+--------+ | zinc | [\${\\ | 65 | 30 | 28 | 30 | 35 | 2+ | | | frac{6 | | | | | | | | | 5}{30} | | | | | | | | | \\text | | | | | | | | | {Zn}}\ | | | | | | | | | ^{2 | | | | | | | | | +}\$]{ | | | | | | | | |.math | | | | | | | | |.inlin | | | | | | | | | e} | | | | | | | +--------+--------+--------+--------+--------+--------+--------+--------+ | bromin | [35/80 | 80 | 35 | 36 | 35 | 45 | 1- | | e | *Br*^− | | | | | | | | | ^]{.ma | | | | | | | | | th | | | | | | | | |.inlin | | | | | | | | | e} | | | | | | | +--------+--------+--------+--------+--------+--------+--------+--------+ 22\. Compare the following terms: +-----------------------------------+-----------------------------------+ | homogeneous (solution) and | In a homogenous mixture, all | | heterogeneous (mechanical | particles are identical or are | | mixture) | uniformly distributed (spaced | | | out), while in a heterogeneous | | | mixture, particles are not | | | identical or uniformly | | | distributed. | +===================================+===================================+ | physical property and chemical | A physical property is one that | | property | can be determined without | | | changing the composition of the | | | substance, while chemical | | | properties are characteristics | | | which are determined when the | | | composition of the substance is | | | changed. | +-----------------------------------+-----------------------------------+ | metal and non-metal | Metals are generally shiny, | | | ductile, malleable, and | | | conductive of heat and | | | electricity. Most are solid at | | | room temperature. Non-metals are | | | dull, not ductile, malleable or | | | conductive. Some are gases at | | | room temperature, while some are | | | solids (and one is a liquid). | +-----------------------------------+-----------------------------------+ | solute and solvent | A solute is a substance that | | | dissolves in a solvent. | +-----------------------------------+-----------------------------------+ | element and compound | An element is a pure substance | | | made of only one type of atom, | | | and cannot be chemically | | | separated. | | | | | | A compound is a pure substance | | | made of two or more different | | | elements bonded together | | | chemically. | +-----------------------------------+-----------------------------------+ | pure substance and mixture | A pure substance is a substance | | | made up of only one type of | | | particle, while a mixture is made | | | up of more than one type of | | | particle. | +-----------------------------------+-----------------------------------+ 23\. Draw a Bohr diagram of the following: a\) oxygen b) silicon