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Elements young
Elements UNIT 1
Term | Definition |
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Chemical formula | a representation of a compound in which the elements are represented by their symbols and subscripts represent the number of atoms of each element |
Subscript | the number written to the right and slightly below an element in a chemical formula; represents the number of atoms of an element present in a chemical formula |
Pure substance | a substance that is not mixed with any other substance |
Precipitate | the solid that is formed as a result of a precipitation reaction |
Physical change | change which alters the physical properties of a substance without changing its identity |
Chemical change | the formation of a new substance with different properties; cannot be undone by physical means |
Element | a pure substance that cannot be broken down chemically into simpler substances |
Compound | a pure substance made by chemically combining two or more elements; represented by a chemical formula |
Chemical symbol – | representation of the name of an element; written as a capital letter or a capital letter followed by a lowercase letter(s) |
Chemical reaction | a change caused by the interaction of two or more substances resulting in the formation of new substances |