Atomic number 25, atomic weight 54.9380. Phosphorus (P): Phosphorus is a poisonous, nonmetallic element that helps protect metal surfaces from corrosion. Atomic number 15, atomic weight 30.9738.

arranged by their atomic number. One never knows when one will need the properties of Rutherfordium in a hurry. See if you can organize the first 25 elements of the periodic table in order in the ...

A total of 25 transuranium elements have now been artificially synthesised ... This podcast is about one of these elements, number 107 in the periodic table, called bohrium. Transuranium elements are ...

The seventh row of the table was completed in 2016 when Tennessine, Nihonium, Moscovium, and Oganesson were added. Elements ...