Unit Test Review

• Atom is a small, positively charged particle that is the smallest particle of an element.
• Atomic Mass is a measure of the number of protons and neutrons in an atom.
• Atomic number is the number of protons in an atom of an element.
• Chemical change occurs when one substance changes into another substance.
• The boiling point of a substance is the temperature at which the liquid turns into a gas.
• A chemical property describes the ability of a substance to react with another substance and form one or more new substances.
• A physical property describes how and object/substance acts on its own.
• A chemical symbol is a letter or symbol that represents a chemical element or compound.
• Clarity describes how much light goes through an object/substance.
• Density describes how much mass is contained in a given volume of a substance.
• Ductile describes if an object can be drawn into a wire or rod without breaking.
• Products described as flammable means those that are readily ignited by a spark or flame

  
• HHPS is the acronym for common household products.
• Lustre describes how much light something reflects.
• Malleable describes the ability of a material to be shaped and reshaped without breaking.
• Mass describes the amount of matter in an object.
• Mass number is the total number of protons and neutrons in an atom's nucleus.
• Matter is anything that has mass and takes up space.
• Mechanical Mixtures are mixtures that are not chemically combined but are physically mixed together. They aren't mixed or they don't stay together, and they can be in more than one state.

  
• Compound is two or more elements chemically combined.

  
• Element is a pure substance made up of only one kind of atom.

  
• Melting point describes the temperature at which a solid turns into a liquid.
• Molecule is a group of atoms that are bonded together.
• Odour is the perception of a pleasant or unpleasant smell.
• Reactivity is the ability of a metal to react with other substances.
• Solubility is the ability of a substance to dissolve in a solvent.
• Solution is a mixture of two or more substances that are dissolved in each other. It looks the same throughout and it stays mixed.

  
• The physical state describes if a substance is a solid, liquid, or gas
• Subscript is the number of atoms of a particular element in a compound.
• Texture describes how something feels.
• WHMIS is the abbreviation for the hazardous chemicals and workplace hazardous materials information system
• Physical changes are changes that can be seen with the naked eye, such as the growth of a plant. It is typically reversible, and doesn't involve a change in the chemical composition of the substance.
• A chemical change results in the formation of a new substance with a different chemical composition. Evidence of a chemical change includes chemical change, colour change, odour change, precipitate production, and light or thermal energy.
• A precipitate is a solid that forms when two liquids are mixed, and can be in many different colours

  
• A corrosive product will burn skin, eyes, throat or stomach. Corrosive in general describes a substance that can chemically damage or destroy steel, aluminum, or other metals. Damages can be destructive and irreversible

  
• Products that are poisonous or harmful are fatal, toxic, or harmful if inhaled, swallowed, or put into contact with the skin.

  
• Explosion hazard products may become explosive if not handled in proper conditions.

  
• Health Hazards can cause chronic health effects and those with targeted health effects, which occur with long term exposure to a product.

  
• Oxidizing gives off oxygen, or other oxidizing substances, greatly increasing the risk of fire or explosion.

  
• Compressed gas are stored under pressure in cylinders. If punctured, it can become unpredictable and dangerous.