Water is a liquid while hydrogen sulphide is a gas. Explain.
Water exists as a liquid at room temperature with a high boiling point. Sulphur is less electronegative than oxygen, and the S-H bond is much less polar than the O-H bond. Hence, there is no hydrogen bonding in hydrogen sulphide, and it exists as a gas normally with discrete H2S molecules.
What bond is present in MgCl2 molecules?
Two elements A and B have the electronic configuration as:
A = 1s22s22p63s2 and B = 1s22s22p5
Write the empirical formula of the substance containing A and B.
What type of bonding would you expect between:
(i) a metal and a non-metal
(ii) a non-metal and another non-metal?
Give reasons in one or two sentences for the observation that in their compounds non-metals form anions and not cations.
Out of Na and K, which will form a more stable ionic bond?
Which will have a greater lattice enthalpy: NaCl or MgO?
Is a covalent molecule always formed between two similar atoms?
Why sodium chloride is a solid whereas carbon tetrachloride is a liquid?
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