The number of electrons in the outermost orbital.
lithium is the third element. It is placed in group-1
Mercury is a natural chemical element, metal, liquid, placed in group 12 (zinc group).
Aluminium is placed in the group 13 of the periodic table of Mendeleev.
Hydrogen is the element with unique properties that doesn't fit in any group.
valence electrons and electronic configuration.
Yes. Bromine is an element. Its symbol is Br. It is placed in Group-17 of periodic table.
Hydrogen is the element with unique properties that doesn't fit in any group.
Xenon is an inert element. It is placed in group-18.
It would be placed in group 17 of non-metals.
Helium is the element that is placed in period 1 and group 18 of the periodic table. It is inert in nature and hence stable.
Oxygen has atomic number 8. It is placed in group-16.
Nickel is a chemical element, metal placed in the periodic table of Mendeleev in the group 10 and period 4.