A chemical bond formed when two atoms share one pair of electrons is a ________ bond; it is best described as ________.
A) double; covalent
B) double; ionic
C) single; covalent
D) single; ionic
E) triple; covalent
Question 2
Which group contains only elements which normally exist as diatomic molecules?
A) nitrogen; sulfur, bromine
B) helium; neon, argon
C) nitrogen; oxygen, fluorine
D) hydrogen; lithium, sodium
E) oxygen; phosphorus, germanium