Group 19 elements have 8 valence electrons (obey octet rule) and are hence stable.
Helium, Neon, Argon, Krypton, Xenon, Radon
There is a total of 17 elements in those groups.
Group 17 elements are called the halogens. Group 18 elements are called the noble gases.
Group 17 elements are called the halogens. Group 18 elements are called the noble gases.
Sulphur and helium have entirely different properties. Sulphur has properties similar to group 16 elements. Helium has properties similar to group 18 elements.
The noble gases are found in Group 18 of the periodic table. These elements are known for their stability and reluctance to form chemical bonds with other elements due to their full outer electron shells.
Group-18 belongs to inert elements. The elements attain stability.
Noble gases (or group 18 elements)
The difference between group 1 and group 2 metals is that group 1 metals have ONE valence electron and group 2 have TWO valence electrons. This makes a great difference in how they react chemically with other elements and compounds.
The oxidation numbers for the first 20 elements in the periodic table are typically as follows: Group 1 elements: +1; Group 2 elements: +2; Group 13 elements: +3; Group 14 elements: +4 or -4; Group 15 elements: -3; Group 16 elements: -2; Group 17 elements: -1; Group 18 elements: 0. Keep in mind that oxidation numbers can vary in different compounds and contexts.
Elements in group 18 do not often form bonds.
The elements that make up Group 18 on the Periodic Table are caleed noble (or inert) gases.