How many electrons in a tellurium (Te) atom have a principal quantum number of n = 4 and a magnetic quantum number of ml = 0?
a)2 b) 3 c) 6 d) 9 e) 18
Why does Beryllium (Be) have a positive electron affinity? (That is, how do we rationalize the fact that it is energetically unfavorable for a Be atom to accept an electron when it is energetically favorable for lithium (Li) and boron (B) to do so?)
a) It has a low Zeff.
b) Occupying a higher energy subshell is energetically unfavorable.
c) It has a full shell of valence electrons.
d) Electron-electron repulsion between two electrons in the same 2p orbital is high.
e) Beryllium has a high electronegativity