Which statements about hydrogen are true?
I.H has a lower ionization energy than He.
II.H- is smaller than H.
III.H bonds with the halogens to form polar covalent compounds.
IV.H is always a metal.
V.H does not have a second ionization energy.
A)I,V
B)II,IV
C)I,III,V
D)II,IV,V
E)I,III,IV,V

Question

Quizplus · Accepted Answer

I is true because H has only one electron in its valence shell whereas He has a fully filled shell, so it's easier to remove an electron from H. 
III is true because H bonds with halogens by sharing electrons unequally, creating polar covalent compounds. 
V is true because H has only one electron to begin with, so it cannot have a second ionization energy. 
II and IV are false because H- is larger than H and H is not always a metal.

Which Statements About Hydrogen Are True