Chemistry Test 1
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Matter is composed of extremely small particles, too small to be seen with a classroom microscope, called ____ | atoms
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| Atoms | the smallest part of an element that has the chemical properties of the element.
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| Matter | anything that has mass and takes up space.
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| Matter can be classified on the basis of its ___ | composition
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| Elements | pure substances that cannot be changed into simpler substances
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| Elements are composed of ___ kind of atom | one
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| Compounds | pure substances that are composed of two or more types of elements that are chemically combined.
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| Compounds can only be changed into simpler substances called elements by ___ changes | chemical
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| Molecule | formed by combining two or more atoms
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| Mixture | composed of two or more different substances that retain their own individual properties and are mixed together.
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| Mixtures can be separated by ___ means | physical
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| Types of physical separation | filtration, sifting, or evaporation
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| ___ can be heterogenous or homogenous | Mixtures
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| Heterogenous Mixture | a mixture that is not uniform throughout, the component substances can be visibly distinguished.
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| Homogenous Mixture | a mixture that is uniform throughout, the substances are evenly mixed and cannot be visibly distinguished.
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| Solution | another name for a homogenous mixture
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| Luster, Conductors, Malleable, Ductile, High Density | Physical properties of metals
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| Luster | Having a shiny surface or reflecting light brightly
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| Conductors | Heat and electricity move through them easily
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| Malleable | Ability to be hammered into different shapes
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| Ductile | Ability to be drawn into a wire
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| High Density | Heavy for their size
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| Dull, Nonconductor, Brittle | physical properties of nonmetals
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| Dull | not shiny
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| Nonconductor | Heat and electricity do not move through them easily
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| Brittle | solids that break or shatter easily
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| Periodic Table | used to identify the basic organization of elements.
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| Period | a horizontal row on the periodic table
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| The elements on the periodic table are arranged numerically by ___ ___ | atomic numbers
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| Family | vertical columns of elements on the periodic table (also called groups)
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| Elements in the same ___ have similar properties | family
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| Metals | A major classification of elements generally located on the left side of the zigzag line on the periodic table.
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| Examples of metals | Sodium, Calcium, Iron, and Aluminum.
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| Nonmetals | A major classification of elements generally located on the right side of the zigzag line on the periodic table
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| Examples of nonmetals | Chlorine, Oxygen, Sulfur, and Iodine
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| Chemical Symbol | shows the atoms of the elements composing a substance.
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| ___ are written with one, two, or three letters | Symbols
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| Na | Sodium
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| Cl | Chlorine
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| H | Hydrogen
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| O | Oxygen
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| C | Carbon
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| N | Nitrogen
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| ___ are made up of one kind of atom and the symbol for each element is unique | elements
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| ___ are composed of more than one element and their formulas have more than one type of symbol showing the different elements that compose the compound | Compounds
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| Chemical Formula | constructed from the symbols of the elements composing the substances
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| Subscript | a number that shows how many of each kind of atom are in the compound
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| The subscript is written to the lower ___ of the element symbol | right
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| NaCl | table salt
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| H2O | water
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| C6H12O6 | glucose
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| O2 | oxygen gas
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| CO2 | carbon dioxide
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| N2 | Nitrogen
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| Chemical reaction | When a substance is broken apart or when substances are combined and at least one new substance is formed.
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| Chemical equation | Used to represent a chemical reaction that has occurred; it contains the chemical names or the chemical formulas of the substances that are involved in the reaction.
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| In a chemical equation, the arrow can be translated as ______ or _______. | yields or makes
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| Reactant | Substances broken apart or combined in a chemical reaction and are located on the left side of the arrow.
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| Product | New substances formed in a chemical reaction and are located on the right side of the arrow.
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| The law of conservation of matter | states that matter can neither be created nor destroyed, but can be changed in form.
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| Balanced chemical equation | has the same number of each kind of atom on the reactant side as on the product side.
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| Coefficient | the number that comes before the chemical formula and indicates the number of molecules that participate in the reaction.
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Created by:
Ms. Phillips
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