Just four years before Mendeleev announced his periodic table, Newlands noticed that there were similarities between elements with atomic weights that differed by seven. He called this The Law of ...

Consequently the oxide must have the formula InO3 and the atomic weight must be about 114. discrepances in the periodic table. It was already observed by Mendelejeff that a discrepancy exists in ...

This year, the periodic table of chemical elements celebrates ... so he was going on only the atomic weights, which weren't necessarily determined to the right accuracy at the time," says Dr ...

But fusing a titanium beam with plutonium to create livermorium is just a test run for much bigger (or rather, heavier) ...

These account for 96.6 per cent of our body weight. These four elements work ... These are almost one-quarter of the periodic table and are mainly found in the first four periods.

All substances have properties. These describe how a subject looks and behaves. Substances have both physical and chemical properties. Developing the periodic table The periodic table was ...