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118 Elements and Their Symbols and Atomic Numbers: Definition, Symbol with Atomic Number
118 Elements and Their Symbols and Atomic Numbers ... remember the first 20 elements of the periodic table: H - Hydrogen He - Helium Li - Lithium Be - Beryllium ...
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The modern periodic table
The element symbol always starts with a capital letter. Any letters that follow will be lower case letters, for example, helium is He. Some element symbols are simple. For example, oxygen is O ...
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Periodic Table of Chemical Elements
Scientists use the periodic table to quickly refer to information about an element, like atomic mass and chemical symbol. The periodic table’s arrangement also allows scientists to discern trends in ...