who many elements are there in periodic table in 1661
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who many elements are there in periodic table in 1661
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Answer:
Explanation:In 1661, Boyle had defined an element as "a substance that cannot be broken down into a simpler substance by a chemical reaction".
IUPAC recommended names for groups of elements in the periodic table.
Group number Recommended name
16 Chalcogens
17 Halogens
18 Noble gases
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Answer:
In 1661, Boyle had defined an element as "a substance that cannot be broken down into a simpler substance by a chemical reaction".
IUPAC recommended names for groups of elements in the periodic table.
Group number Recommended name
16 Chalcogens
17 Halogens
18 Noble gases
Explanation: