NiF2 is the correct answer for the is problem
The untrue statement is that they high melting points.
The covalent compounds are the compounds exhibiting strong intra-molecular bonds. This is due to the tightness of the atoms within the covalent molecules. The force of attraction between the individual molecules in a covalent compound seems to be weak. The covalent compounds exhibit weak intermolecular forces that hold the atoms together due to this they have a low melting point.
C the temp of the thermal energy in an object or around
i know this i just had this assingment 10 min ago and i had it right
The answer is A.
Hope this helps,
kwrob
