The number of valence electrons remains the same
valence electrons
lanthanoids and actenoids
because they are of f group
Astatine is placed in group-17 in the Periodic Table. Its symbol is At.
Noble gases are found in the 18th group in the periodic table.
valence electrons
lanthanoids and actenoids
Top row, of the bottom two rows on the Periodic Table. (Period 6, starting at group 4)
lanthanoids and actenoids
They are the vertical columns on the Periodic Table. Each column (top to bottom) is considered to be a group or family.
A group in Periodic Table is the column of element in periodic table
because they are of f group
memorize the elements group wise (top to bottom).
It is present in the Bottom right corner of the table. It is in 7th period, 18th group.
Chlorine is in Group 17 of the Periodic Table.
A group in periodic table is the column of element in periodic table
Chlorine is in Group 17 of the Periodic Table.