Which statement best describes the properties of sodium chloride? A. high melting point B. poor conductor of electric current when melted C. tendency to not shatter when struck D. all of the above
3,10,17,24, ... what will be the 100th number in the pattern?
3,10,17,24, ... what will be the 100th number in the pattern?
Salts always have high melting points.
Sodium chloride is an ionic compound held together by strong electrostatic forces of attraction between the positive and negative ions. More heat energy is required to overcome these bonds for the ions to be mobile in the liquid (molten) state. Hence sodium chloride will have a high melting point. Option B is incorrect because an ionic compound in the molten state will have mobile ions that can function as charge carriers, thus increasing the electrical conductivity of the molten salt. Option C is incorrect because the electrostatic forces of attraction that permeate the sodium chloride ionic lattice structure are very strong. A solid compound's propensity to shatter when struck might be true for alloys, where the addition of elements disrupts the regular lattice structure until it is weakened. Hence the answer is Option A.
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