because inert gases were not discovered at that time..
Helium and neon did not appear in Newlands' table because they are noble gases, which were not discovered until after Newlands' periodic table had been proposed. The noble gases were not known at the time when Newlands arranged the elements based on their properties.
it wasn't a real table
The abbreviation for helium on the periodic table is He.
The table of Newlands was only an incomplete precursor of the Mendeleev table.
Helium is in the first period of the periodic table.
The noble gases group is missing from John Newlands' periodic table. The noble gases were not discovered until after Newlands proposed his periodic table in 1864.
Helium and neon did not appear in Newlands' table because they are noble gases, which were not discovered until after Newlands' periodic table had been proposed. The noble gases were not known at the time when Newlands arranged the elements based on their properties.
Newlands' periodic table was rejected because it had gaps and did not account for newly discovered elements. The periodic table was improved by Mendeleev's table, which arranged elements in order of increasing atomic weight and left gaps for undiscovered elements. This allowed for a more accurate prediction of the properties of missing elements.
it wasn't a real table
The abbreviation for helium on the periodic table is He.
No, the symbol "H" stands for Hydrogen on the periodic table. The symbol "He" stands for Helium on the periodic table.
the number of helium in the periodic table is 2.
The table of Newlands was only an incomplete precursor of the Mendeleev table.
Helium is in the first period of the periodic table.
The atomic symbol for helium on the periodic table is He.
J , and Q are missing.
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