Three main classes are:MetalsNon metalsTransition elementsThey are present in periodic table.
metalsnon metalssemi metals
metalsnon metalssemi metals
The three broad classes of elements found the periodic table are metals, non metals, and metalloids.
the three groups in periodic table are the metalic elements,non metalic elements and the third one are metalloids
germanium, gallium and scandium are the missing elements in Mendeleev periodic table
the periodic table is the table of elements that exist in the world. mandelevees discovered these elements a long time ago. he left three blank spaces because they were not discovered yet. these three elements are now found in the modern periodic table.
HydrogenHeliumLithium
They are metals.
There are three-letter elements on the peridic table because they do not have real names yet.
The elements on the periodic table are divided in three categories which are metals, non-metals and metalloids.Metals and nonmetals are two categories that are used to classify the elements in the periodic table. The third is inert gases.
The three main categories of elements on the periodic table are metals, metalloids, and nonmetals.