'Silver-107 & silver-109 are 2 naturally occurring these of silver'
isotopes
PUT OUT THE GOOD SILVER: Silver-107 & silver-109 are 2 naturally occurring these of silver
Silver-107 & silver-109 are 2 naturally occurring these of silver
Silver-107 & silver-109 are 2 naturally occurring these of silver
PUT OUT THE GOOD SILVER
isotopes
PUT OUT THE GOOD SILVER