Each column is a group of chemical elements.
sorry I don't know
==Yes== Hydrogen, a gas, is found on the left side of the periodic table. And it depends on which periodic table you look at. The standard 18 column ones have hydrogen on the left, but, a geologists' periodic table may have more (sorry, I'm not a geologist, I just know there is such a thing). But I think you mean the everyday periodic table... So yes, hydrogen.
You look at the periodic table.
Knowing the column in which an element appears on the periodic table can tell you about its group/family. Elements in the same column typically share similar chemical properties and reactivity due to having the same number of valence electrons.
I'm not an expert (I'm 11 years old) but I'm very sure Carbon (C), Radium (Ra), Oxygen (O) and Yttrium (Y). Carbon can be found in column 4a, Radium in column 2a, Oxygen in column 6a and Yttrium in column 1b which if you didn't know, comes after the row 2a (have a labeled column periodic table to understand this)I hope you find this of help =)
its in column two on the periodic table, so therefor it has two valence electrons .
The "Periodic Table of Elements" is used for classifying the elements, and to know which one is which.
A tool to organize the elements
Family six on the Periodic Table of elements is also know as Chalcogens
This was done only save space. Because there are so many elements in each Group (Group IIIB)--numbering 14 each--the Periodic Table would be twice as wide than as we know it.
To know the no. Of elements
i don't know the scientist but it is the periodic table of the elements