The periodic table was arranged by atomic mass ... further why Moseley’s X-rays corresponded so well with atomic number. The idea behind the explanation is that when an electron falls from a higher ...

What do all these things have in common? They all have a link to the periodic table, which turned 150 in 2019! Here are some fascinating elements that you may never have heard of, but definitely ...

Two elements in group 1 of the periodic table are lithium and sodium. Very small pieces of lithium and sodium were reacted separately with water. In the periodic table, the group 7 elements and ...