- All are gaseous
- All have a low reactivity
- All have the outermost shell of electrons completely filled
- All have very low melting and boiling points
- Excepting argon they are rare gases
hydrogen
groups or family:))
A vertical column is called a 'group.' A horizontal row is called a 'period,' thus the periodic table.
In the periodic table a column is the elements that go down the way.for exampleLiNaKRbCsFrThis is a column and called the Alkali metals. Group 1.A period is when it goes across.
Elements are organised in terms of properties in same column. Properties are found to be periodic .
Representative elements
No, that is not a symbol on the periodic table. Simliar symbols includeAg which is SilverAc which is ActinumAm which is AmericiumAl for AluminiumAr for ArgonAt for AstatineAs for ArsenicAu for Gold
groups
A group in the periodic table is a column of elements that share similar chemical properties due to having the same number of electrons in their outer energy level. Groups are vertical columns and are numbered from 1 to 18.
A group of elements.
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hydrogen
Chemical properties.
groups or family:))
Yes, it is.
groups
In the Periodic Table of the Elements, a column (group) contains all elements that exist with the group number of electrons in the outer energy level of an atom of that element.