mason study i guess > Periodic table > Flashcards
No 34
Se (Selenium)
No 33
As (Arsenic)
No 37
Rb (Rubidium)
No 38
Sr (Strontium)
No 50
Sn (Tin)
No 51
Sb (Antimony)
No 55
Cs (Cesium)
No 87
Fr (Francium)
No 75
Re (Rhenium)