Iron has two electrons in the outa shell meaning that it has a valency of +2 Lewis is awes!!!
Halogens have a valency of -1.
You will have to check the valency from a periodic table. It will be written on the top right hand corner. e.g., O2
They have the same Valency
No sodium and lithium are in the periodic table they are both in the first column and are metals. They both have a valency 1
Tin has a valency of +2 or +4 in the periodic table. It tends to form compounds in which it can either donate two or four electrons to achieve a stable electron configuration.
The last element in the 3rd group of the modern periodic table is gallium, with the symbol Ga. Gallium has a valency of +3, meaning it tends to lose three electrons to achieve a stable electron configuration.
1 and 2 respectively
frst , u should know the valency of the elements. then, study the Periodic Table and then, apply to ur equation and application.
Iron oxide is not on the periodic table because it is a compound and the periodic table is only for elements.The elements that make up iron oxide (iron and oxygen) can be found on it however.Iron is near the top and middle of the periodic table and has the symbol Fe.Oxygen is near the top-right corner and has the symbol O.
Iron stands for the element with the chemical symbol Fe on the periodic table.
iron=Fe
The atomic number that sodium has in periodic table is 11 and valency is 1. The periodic table is a kind of table that was invented for the better study of elements and other types of compound. It makes the systematic study of elements.