It doesn't entirlely stand alone. there is no gap from hydrogen and the rest of the table. Hydrogen is just simply singular. It only has one proton. No neutron. One of a kind. even though I believe deutrium to be number 2 on the table rather than helium. And neutronium should be classified as element 0. Should be categorized in the periodic tables at all time.
Most of them; only a few (Nitrogen, Oxygen, Flouride and others in flouride's column) are diatomic
Ununseptium
Hydrogen
As==Arsenic. This element is a metaloid.
Argon (Ar, element number 18) is the last element in the third period of the periodic table.
Search this element in the periodic table of Mendeleev.
Gypsum is a sample of the element calcium on the periodic table.
Radon is an element of group 18. This is the group of the noble gases.
Group in periodic table: 14
As==Arsenic. This element is a metaloid.
Oxygen is the first element in group 16 of the periodic table
Argon (Ar, element number 18) is the last element in the third period of the periodic table.
A group in Periodic Table is the column of element in periodic table
Yes, it belongs to group 6 in the periodic table and its a gas
It would belong to group XVI, the group with oxygen.
17
Titanium belongs to the titanium family, which is group 4 on the periodic table.
group 1, or 2, or ... 18 depends on its properties.
Your question does not make sense. Sodium is an element. It is a member of the "alkali metal" group of elements. (Group 1 in the Periodic Table.)
Search this element in the periodic table of Mendeleev.