Old Informational but lacks certain elements such as rutherfordium, dubnium, seaborgium, bohrium, hassium, meitnerium, darmstadtium, roentgenium, copernicium, ununtrium, flerovium, ununpentium, livermorium, ununseptium and ununoctium. We're talking the 1950s.
I'm in year 7 and working at gcse scince in chemestry Awsome
Junk Doesn't work.
Wonderful i like it