If the density of solid chromium is 7.15 g/cm3 , what is the packing efficiency of Cr if it adopts a body‑centered cubic unit cell? The molar mass of Cr is 51.996 g/mol .

Start an single atom tab. observe the decay of polonium-211. after each decay, press the reset nucleus button to watch the process again. write a description of alpha decay for po-211

If i add water to oil what will happen

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions