Alkali Metals.
A group in Periodic Table is the column of element in periodic table
Calcium, Magnesium, and Radium are all in group two of the periodic table.
Group-1 elements are called alkali metals. They have one valence electron.
group 14
The element in period 4, group 7 of the periodic table is Manganese (Mn).
Argon (Ar, element number 18) is the last element in the third period of the periodic table.
This element is francium.
lithium
5
The letter or group of letters that represents an element on the periodic table is called the chemical symbol. Each element is assigned a unique chemical symbol, typically derived from the element's name in English, Latin, or another language. These symbols are used to identify and differentiate between the various elements in the periodic table.
group 1
group 18