Which statement is true about the properties of the majority of the elements in the far left column of the periodic table?
A.
They have no luster
B.
They are highly reactive.
C.
They have low heat conductivity.

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent