Answer:
2.7005 g/cm²
explanation: as we know density=mass/volume
Li is in group 1 so it has same number of valence electrons as hydrogen.
hope it helps.
Answer:
The two elements are POLONIUM and RADIUM.
Explanation:
Maria Curie is a French physicist and chemist, though she was of a Polish naturals. She was the first woman to receive a Noble Price which she earned for conducting leading and head way research on radioactivity. She discovered the theory of radioactivity; also the techniques isolating radioactive isotopes. These helped her and her husband discover Polium and Radium.
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