Same number of valence electrons cause same properties. The elements with same properties are grouped together. For example- the alkali metals are placed in group-1
elements are in the same group since they react similarly to other elements in that group.
main group elements
There is a total of 17 elements in those groups.
No. noble gases are group VIIIA or group 18 elements
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.
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 the second group of the periodic table, also known as Group 2 or the alkaline earth metals, will have 2 electrons in their outer shell. This gives them a full s subshell and makes them relatively reactive.
group 2 elements are alkaline elements.one of the element in d group is berrylium
Group one elements are the alkali metals.
Causes: very low ionization potential, very great electropositivity.
Group IA or group 1 elements are known as alkali metals.