Gallium or Boron - they are in the same group but one level lower or higher. Elements in the same group tend to have similar chemical properties.
Mg
boron
Al
The element in the same group as lithium (Group 1) and the same period as iron (Period 4) is potassium.
Please provide the specific ionization values you are referring to so I can accurately identify the third period element.
The element that is in the same period as Sodium and in the same group as Iodine is Chlorine. Sodium and Chlorine are in the same period (period 3) and Iodine belongs to the same group as Chlorine (group 17, also known as the halogens).
3
Please provide the specific ionization values you are referring to so I can accurately identify the third period element.
boron
Al
Br (Bromine) is a period 4 element in the same group as F.
It's Al. And it is the thirteenth element on the periodic table.
The period of an element is determined by electronic configuration.Period is same as the number of energy levels of the element.
B (boron)
Including S such elements are 8, Na,Mg,Al,SI,P,S,Cl and Ar. (3rd period of periodic table)
chlorine
It's BROMINE. That is the element that is a liquid in the same period as Fe.
The number of electrons in its valence shell