Name the phase change that occurs when a diamond film forms on a surface from gaseous carbon atoms in a vacuum?.

What does a numerical subscript following an element in a chemical formula mean?

Element j is 1s 2s 2p 3s . (i) how many unpaired electrons does j have? (ii) is j a good oxidizing agent or a reducing agent? (iii) state reason for the answer.

Which method would be best to separate a mixture of sand and gravel