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13 Cards in this Set
- Front
- Back
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What is a Psychical Change?
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A change that affects the size, shape, color of a substance but does not affect the composition.
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What is a Chemical Change?
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A change that occurs when a substance is changed into a new substance with new properties.
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What is an element?
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Elements are substances that cannot be broken down into simpler substances.
-An element is made up of one type of atom. |
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What is an atom?
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An atom is the smallest article of matter, that still has properties of matter.
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How many elements are there?
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There are 118 elements, which are arranged on the periodic table.
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How are elements represented?
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-With chemical symbols
Example; C = Carbon An = Gold |
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What are metals?
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Metals are elements that are shiny; good conductors of thermal energy and electric current; Most metals are malleable and ductile.
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What is malleable?
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Can be pounded or bent without breaking
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What is ductile?
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Can be drawn or pulled into a wire.
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Where are metals located on the periodic table?
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Metals are located on the left of the staircase. Except Hydrogen (H)
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Which group of elements are good conductors, are malleable, ductile and have luster?
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Metals.
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What is a physical property?
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A property that can be observed or measured without changing the composition of matter.
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What is a chemical property?
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Describes how one substance reacts with another substance.
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