Even though chemists had identified relationships between small groups of elements, the one scheme to bring them all together ... Two years later, Julius Lothar Meyer and William Odling independently ...

You interact with about two-thirds of the elements of the periodic table every day. Some, like carbon, oxygen, and nitrogen, make up our bodies and the air we breathe. Yet there is also a class of ...

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 ...

These are almost one-quarter of the periodic table and are mainly found in the ... The remaining 17 are trace elements needed in very small quantities. For example, iron is necessary for producing ...