This is when he noticed a correlation between atomic weight and chemical properties. However, the exact "Eureka!" moment that led Mendeleev to the sorting strategy of the complete periodic table ...

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 ...

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.

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

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 ...