Scientists are attempting to determine the composition of an unknown compound. The compound has a high melting point and is a good conductor of electricity. Which of the following elements most likely make up the compound? a. Magnesium and Fluorine
b. Lithium and Calcium
c. Boron and Chlorine
d. Phosphorus and Sulfur

Iwould you figure it out but you don't have a picture or in your question as to what the physical property you're looking for is

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.

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