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Stack #174823
list 2 elements
Question | Answer |
---|---|
boron | B |
radium | Ra |
cobalt | Co |
barium | Ba |
krypton | Kr |
radon | Rn |
rabidium | Rb |
beryllium | Be |
magnganese | Mn |
arsenic | As |
aragon | Ar |
xenon | Xe |
cesium | Cs |
strontium | Sr |