2
There are 7 metalloids in periodic table. They are present on zigzag line in periodic table.
Metalloids are present in a zigzag pattern in periodic table. It is towards right in table.
The d block of the periodic table contains 10 valence electrons.
4
How many grams does NO from periodic table have
July 2009: 117 elements (111 omologated by IUPAC)
As is present in group-15. It has 5 valence electrons.
There are 18 groups on the periodic table.
There are 53 Elements in the Periodic Table.
there are precisely 118 elements on the periodic table.
The periodic table has 7 periods on it.
7 periods and 18 groups are there on the modern periodic table.