After the first level has two electrons, the next electron goes into the second level. 2nd Period: Lithium to neon—Electrons go into the second level. After the second level has 8 electrons, the next ...
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118 Elements and Their Symbols and Atomic Numbers: Definition, Symbol with Atomic Number118 Elements and Their Symbols and Atomic Numbers: The periodic table is a well-organized chart that contains all the known elements in the universe.These elements are building blocks of matter ...
The periodic table is a way of arranging elements according ... oxygen, fluorine and neon and each of these elements has two electron shells. SUNAYANA: And as we go down the vertical columns ...
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