There are lots of different substances but ... Caesium is the next element in group 1, and it can be found below rubidium. You can accurately predict that it will have the lowest melting point ...

One of the most remarkable things about element 87 is the number of times that people have claimed to have discovered ... could be used to identify each substance. He boldly claimed in a number ...

Compounds are made from two or more elements that are chemically bonded together. Compounds are a second type of pure substance. Compounds always have the same ratio of elements. For example, Pyrite ...

A mixture is formed when two or more elements or compounds are present without being chemically bonded together. The substances which have been mixed are not present in specific amounts or ratios ...