Elements within a group always have the same number of valence electrons.
The groups in the periodic table tell you what each element within them will react with, the number of valance electrons the element has, and what family it is in.
The element "Cadmium" is in group number 12.
The number of Electrons is always the same as the number of Protons.The number of Protons is the "Atomic Number" in the Periodic Table.The element with Atomic Number 7 is Nitrogen (N).Nitrogen is at the top of Group 15 in the Periodic Table.See related link below.
The element Hydrogen is in the group number 1.
periodically within a group
Group: Group 3 element (actinide) Atomic Number: 98
The expected number of valence electrons for a group 3 A element is 5 number of valence electrons.
The number of valence electrons tell us the group number of that element.
Oxygen is the element having atomic number 8. It is present in group-16.
In s and p blocks the number of valence electrons in an element is the same number of the group which that element belongs to. Hope this helps....
Lithium The element number represents the number of protons in its nucleus. That means the smaller number a element has, the lighter it will be. Lithium is the third element.
group name is noble gases. group number is 18.