Ammonia,ethyne,hydrochloric acid gas,NaH,which of these is not a covalent hydrides?

Question

anonymous · Answer

Any ans for me?

jfraser · Answer

all of those have bonds between hydrogen and another atom.

H-N
H-C
H-Cl
and
Na-H

three of the bonds are covalent bonds, because the hydrogen is bonding to a NON-metal. once is an ionic bond, because the hydrogen is bonding to a METAL

anonymous · Answer

Which one among them is iconic bond?

jfraser · Answer

the one that where hydrogen is bonded to a metal

anonymous · Answer

Meaning NaH is d iconic bond?

jfraser · Answer

ionic, not iconic, but yes

anonymous · Answer

Thanks. Pls help me with this also, When alkali metals are heated with hydrogen,what do they form? Is it covalent,ionic,metallic or non-stoichiometric hydrides?

jfraser · Answer

sodium is an alkali metal. this question is exactly like your last one

anonymous · Answer

So what's the answer?

jfraser · Answer

sodium and hydrogen form NaH, which is the same kind of hydride you answered earlier