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.
Approximately '120' . However, those elements from No. 100 120 have not been fully characterised.
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.