2nd Period: Lithium to neon—Electrons go into the second level ... The sodium reacts with the water and gets very hot, producing sodium hydroxide and hydrogen gas. The demonstration shown in this ...

The zigzag, staircase, line in the diagram of the periodic table above separates the metals, on the left, from non-metals, on the right. Hydrogen is a non-metal, but it is often put in the middle.

It seems that a significant percentage of the world’s neon gas is produced in Ukrainian ... sitting in the column at the extreme right of the Periodic table. It occurs in nature as a small ...