periodic table of elements

periodic table of elements   Dan periodic table

Periods are the rows of the periodic table, groups are the columns Every element has a unique combination of period and group, and a unique atomic number

Periods are the rows of the periodic table, groups are the columns Every element has a unique combination of period and group, and a unique atomic number  Short videos about every element on the periodic table, plus other cool experiments and chemistry stuff

เลขช้างลาว Download a printable version of the Periodic Table of Elements in PDF format: - Color: Basic Advanced  Periodic Table of Elements ; 2, He, Helium, inert gas, second-lightest element, nuclear fusion in sun and stars, balloons, lasers, supercold refrigerant ; 3, Li