Arrange the formulas of the following substances in a row in order to increase the polarity of the covalent bond: a) hydrogen bromide, b) hydrogen fluoride, c) hydrogen chloride, d) hydrogen iodide.
The elements bromine (No. 35), fluorine (No. 9), chlorine (No. 17) and iodine (No. 53) are placed in one group, and in the group with a decrease in the serial number of a chemical element, electronegativity increases, respectively, and the polarity of the covalent bond of the proposed substances increases …
Answer: d), a), c), b).
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