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.

The modern periodic table, arranged in rows and columns, was first introduced by Dmitri Mendeleev in 1869. At the time, it included the known elements and their properties, but Mendeleev predicted ...

A versatile calculator app that offers a wide range of calculation features, supporting regular and scientific calculations, number base conversions, byte conversions, date difference calculations, ...

Swedish police have said 11 people have been killed at an adult education centre, in what the country's prime minister said is the worst mass shooting in Sweden's history. The attack happened at ...

the density and molar mass of oxide product can be obtained via periodic table of elements. Thus, the molar volume of oxidized product can be calculated via the formula: Commercially pure Mg (99.9 wt.