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All the elements in third row have 3 shells. The electron enters in the third shell for all the groups.
-Fermium : it was named after nuclear physicist Enrico Fermi -Einsteinium: it was named after Albert Einstein -Mendelevium: it was named after Dimitri Mendeleev :-) :p <3
johann dobereiner had contributed towards the base of the periodic table and discovered that the elements shared similiar properties because there always was three elementzs in three groups that he later refered to as Triads.
Three elements.
Elements are classified as set out in the Periodic Table of the elements. It is NOT clear to what "three" you are referring.
Solids, Liquids, and gases.
Solids, Liquids, and gases.
There are three types of elements: metals, metalloids, and nonmetals. Most elements are metals.
inert gases
Newland, Moseley, , Dobereiner, Mendeleeff...
a scientist who studies taxonomy is called?
Metal, Non Metal, Noble Gas
In 1817, Döbereiner began to formulate one of the earliest attempts to classify the elements. He found that some elements formed groups of three with related properties. He termed these groups "triads". In all of the triads, the atomic weight of the second element was almost exactly the average of the atomic weights of the first and third element..
Einsteinium and mendelevium, Thorium, Curium, Fermium, Rutherfordium, Bohrium, Seaborgium, etc., etc.
you can arrange three beads 9 different ways.
A German chemist Dobernier observed relationship between atomic masses of several groups of three elements called traids.In these groups the central or middle element had atomic mass average to the other two elements.
generally groups 3-12 are called the transition metals.