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The positively charged centre of the atom.
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Branch of natural science. (deals with the composition of substances).
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The chemical change as a result of passing an electrical current through a substance.
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The theory stating that atoms are indestructible and indivisible, the mass of all atoms of a single element have the same mass, compounds are formed by two or more atoms, and that chemical reactions are a rearrangement of the atoms in a substance.
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The characteristic of a substance to be positively or negatively charged.
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Any substance with a pH reading higher than 7, with the ability to neutralize an acid
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Combined elements in a fixed chemical bond.
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A change in a substance resulting in the alteration of one or more of its physical characteristics.
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A compound containing only two elements.
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A substance that increases the rate of a chemical reaction, without being consumed in the process.
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The substance created by means of a chemical reaction.
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Smallest units of matter, that act as the building blocks of our world.
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Two or more atoms held together in a covalent bond.
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A series of symbols that tell you if a substance is hazardous, and how.
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Any element found in group 2 of the periodic table of the elements.
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A regular 3D geometric arrangement of particles.
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A substance that changes colour in reaction to coming in contact with either an acid or a base.
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A chemical compound of hydrogen and oxygen atoms, that can create a basic substance.
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The coating of a substance with a thin layer of metal by means of electroplating, to prevent corrosion.
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Sheets of paper that identify the hazards and safety measures, that need to be taken when handling a certain substance in the lab/work environment.
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The simplest chemical substance that cannot be further broken down by chemical means.
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The inert gases of group 18 of the periodic table of the elements.
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The time it takes for any given reaction to take place.
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The number that indicates the amount of a chemical or chemical compound in a chemical equation.
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The production of water and salt, from the combination of an acid and a base.
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The substances shown on the left side of the "staircase" on the periodic table of the elements.
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Vertical column in the periodic table of the elements, that contains elements with similar properties.
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A separated non-uniform mixture.
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The substance that reacts in a chemical reaction to create the product.
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The soft, light, reactive metals, found in group 1 of the periodic table of the elements.
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The horizontal rows of the periodic table of the elements that indicates the amount of energy levels in an elements atom.
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neutrally charged part of an atom, that carries an atomic mass of 1.
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A compound that conducts electricity, made from a metal and a non-metal.
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A type of drawing that depicts the atom as a small positively charged nucleus, surrounded by negatively charged electrons.
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The law stating that the amount of energy in a chemical equation stays the same from reactant to product.
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A natural protein that has catalytic properties.
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The number equal to the number of protons in an elements atom, that determines that element's chemical properties.
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a compound of carbon and hydrogen atoms that is often found in products such as gasoline and propane.
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Tabular chart of chemical elements according to their atomic number.
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The scale that indicates whether a substance is basic or acidic, and to what degree.
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Negatively charged part of an atom
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A substance that conducts electricity when in a solution or in an aqueous state.
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A reaction that gives off energy in the form of heat.
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The release of CO2 and H2O, due to a chemical compound being exposed to pure oxygen.
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A homogeneous mixture, formed from the dissolving of substances into one another. (Can be solid, liquid, or gas).
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positively charged part of an atom
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Any one orbital of an atom around which electrons are found.
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The group that establishes the official names for all chemical elements and compounds.
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A substance that cannot conduct electricity in any state of matter.
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The breaking down of a substance, in reaction to its surroundings.
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A molecule, consisting of two atoms.
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Any substance with a pH reading lower than 7, with the ability to neutralize a base.
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The law stating that the total mass of the reactant will equal the total mass of the product.
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Any substance near, or around the "staircase" on the periodic table of the elements. (They have the characteristics of both a metal and a non-metal).
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a well-combined, uniform mixture.
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The negative ion of hydrogen, (which can have a positive or a negative charge).
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A reaction that absorbs heat from its surroundings.
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Has the ability to burn or corrode organic tissue/material.
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A change in a substance resulting in the creation of an entirely new product.
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A compound that does not conduct electricity, composed of two non-metals.
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Any element found in group 17 of the periodic table of the elements, that combine with a metal to form a salt
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(in grade 9 chemistry) the ability to conduct electricity.
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A substance made from only one type of atom.
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the naming system of chemical compounds, that includes two other sub-categories of naming.
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The weighted average of the masses of all isotopes of an atom.
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Any substance that stops or slows a chemical reaction.
