Periodic tables sometimes look different from each other ... The first Group 1 element, lithium, has the highest melting point at 180°C. The melting points then get gradually lower, with the ...

The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...

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 ...

Currently, there are 118 known elements on the periodic table, from hydrogen all the way to oganesson, which was officially named in 2016. It's pretty hefty, with at least 294 subatomic particles ...

Dmitri Mendeleev made order out of chaos when he introduced his periodic table in 1869. Until then, the 63 known chemical elements were scattered without a coherent system, making it difficult for ...

At the heart of our biological composition are four elements: oxygen (O), carbon (C), hydrogen (H ... These are almost one-quarter of the periodic table and are mainly found in the first four ...