The development of the Periodic Table started
in the 1800s as chemists began to recognize such similarities in the properties
of various elements. Chemists arrange these elements into families. The most
famous and successful classification, widely accepted by chemists, was published
in 1869 by Dmitri Mendeleev, a Russian chemist. His Periodic Table arranged the
elements known at that time, in order of increasing atomic
masses.
In this section, we examine the periodic
trends and group properties of elements, their properties, reactivity and uses.
Students should be able to appreciate the development of the Periodic Table and
hence to envisage that scientific knowledge changes and accumulates over time,
and also the need for conserving some of the finite resources.
8.1 Periodic Trends
8.2 Group Trends
9.5 Iron
No comments:
Post a Comment