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while declaring the Class X results today said no bonus marks were given for the atomic table that was not provided in the Chemistry paper. “Since it was a new curriculum, it was not necessary to ...

This year we celebrate the 150 th anniversary of Mendeleev’s achievement in formulating the structure of the periodic table that we use today. He announced his structure in 1869, but the challenge of ...

In this periodic table of elements quiz, you have 10 minutes to name as many elements as you can, given only their symbol, ...

New discoveries continuously refine our perspective, with many breakthroughs reported regularly. Whether revolutionary or ...

Aluminum is a metal in group IIIA of the periodic table with atomic number 13, an atomic weight of 26.982, and a density of 2.70. It has a melting temperature of 660 C. The electronic configuration of ...

Silicon is a semiconductor in group IVA of the periodic table with atomic number 14, an atomic weight of 28.086, and a density of 2.33 Mg/m 3. It melts at 1410 C. The electronic configuration of the ...

On 17 February 1869, Russian chemist Dmitri Mendeleev jotted down the symbols for the chemical elements, putting them in order according to their atomic weights and inventing the periodic table.