An element X contains 6 electrons in M shells as valence electrons. What is the atomic number of X and also identify wheather X is metal or non metal?
in simple way
K=2 electron
L= 8 electron
M=6 given
Hence total electrons...... 2+8+6=16, hence its atomic number is 16.
As the valence electron in this elements is 6, therefore it required 2 electrons to complete its octect.
As it is going to gain electrons therefore it has be a non metal.