How many sub-energy levels does the 2nd MEL have?

n=  |Shell            |       Maximum Number of Electrons

1    |1st Shell      |      2

2   |2nd Shell      |      8

3   |3rd Shell        |      18

4   |  4th Shell        |      32

Explanation: cause :)

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.