The elements radium and astatine both arise during the radioactive decay of uranium. They get together...

The elements radium and astatine both arise during the radioactive decay of uranium. They get together in the form of the salt RaAt2; the radius of the Ra2+ ion is 162 pm and the radius of the At- ion is 226 pm. (a) Predict the coordination number of Ra and At as well as the type of lattice that RaAt2 will adopt. (b) Calculate the lattice energy of RaAt2.

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queen_honey_blossom answered 5 months ago

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