Strontium Sulphur Scandium Silicon
Radium Radon Uranium Rhenium
Rubidium Rhenum Rhodium Ruthenium
Ruthenium Rubidium Rhodium Radium
Sulphur Silver Selenium Silicon
Nickel Sodium Silver Neptunium
Strontium Scandium Selenium Samarium
Sulphur Selenium Samarium Silver
Scandium Silver Silicon Sodium
Tin Argon Silver Gold