It is because the group 1 and 7 elements have a high reactivity. The reactivity is far too high to use on there own because the elements in these groups react with air and/or water.
According to Chemists, the elements of sodium and chlorine belong to the same atomic family as well as carbon and lead.
group 1 elements.
The noble gases in group 18 of the periodic table do not usually form compounds with other elements. Under very unusual circumstances in the laboratory, chemists have forced many of these elements to actually make compounds but none of the noble gases make compounds under normal conditions.
The Nitrogen Group.
Group 18 elements, which are also known as noble gases, rarely form chemical compounds.
Periodic table group elements with similar properties together. It makes study of elements easier for chemists.
group 17
According to Chemists, the elements of sodium and chlorine belong to the same atomic family as well as carbon and lead.
group 1 elements.
all of the elements in the third group
The transition metals tend to form colored compounds.
The noble gases in group 18 of the periodic table do not usually form compounds with other elements. Under very unusual circumstances in the laboratory, chemists have forced many of these elements to actually make compounds but none of the noble gases make compounds under normal conditions.
The Nitrogen Group.
Group 18 elements, which are also known as noble gases, rarely form chemical compounds.
Almost every other element except the elements in group 18 bond with oxygen to form compounds.
The transition metals often produce colorful compounds.
yes