8th Chemistry Vocab
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Anything that has volume and mass | Matter
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| Smallest unit of an element | Atom
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| Small, dense center of an atom composed of protons and neutrons | Nucleus
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| Positively charged subatomic particle located in the nucleus of atoms | Proton
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| A subatomic particle located in the nucleus of atoms that has no charge | Neutron
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| A negatively charged subatomic particle located in energy levels around the nucleus of atoms | Electron
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| The electrons in the outermost energy level of an atom | Valence electron
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| The basic building blocks of matter and are composed of just one type of atom | Element
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| The number of protons in the nucleus of an atom which identifies the element | Atomic Number
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| The mass of an atom which is the total number of protons and neutrons in the nucleus of an atom | Mass number
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| The average mass of all the isotopes of an element | Atomic Mass
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| Each verticle column of elements on the periodic table | Family/group
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| Each horizontal row of elements on the periodic table | Period
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| A property of matter that describes a substance based on its ability to change into a new substance with different properties | Chemical property
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| A property of matter that can be observed or measured without changing the identiy of the matter | Physical property
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| A change that occurs when one or more substances are changed into entirely new substances with differenct properites. | Chemical change
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| A change that affects the siz, shape, phase or color of a substance but does not affect is composition. The same substance or substances remain. No new ones are formed | Physical change
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| Elements that are shiny, ductile, and malleable and are good conductors or thermal energy and electrical current | Metals
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| Elements that are not shiny and are poor conductors of thermal energy and electric current | Non-metals
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| Elements that have properties of both metals and nonmetals; sometimes referred to as semiconductors. | Metalloids
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| Materials that reduce or inhibit the transfer of thermal energy and electric current | Insulators
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| Materials that conduct thermal energy and electric current very well | Conductors
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| The process by which one or more substances change to produce one or more different substances | Chemical reaction
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| A chemical reaction which absorbs heat energy | Endothermic chemical reaction
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| A chemical reaction in which heat energy is released. | Exothermic chemical reaction
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| A shorthand or abbreviated way to write the name of a chemical element | Chemical symbol
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| A shorthand description that uses chemical formulas to describe a chemical reaction. | Chemical equation
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| The starting substance or substances in a chemical reaction | Reactants
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| The substance or substances that are formed in a chemical reaction | Products
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| A charged particle that forms during chemical changes when one or more valence electrons transfer from one atom to another | Ions
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Or sort by any of the columns using the down arrow next to any column heading.
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