Bromine because they are both in Group 17, which means they have the same number of valence electrons
A solid will start to melt when it reaches its melting point. For example the melting point of Helium is -272° Celsius and the melting point of Carbon is 3500° Celsius . Helium has the lowest melting point and carbon has the highest melting point in the periodic table.
Wait what you answered your own question
The amount of heat a 30-gram sample of substance Y absorbs to melt at its melting point is <u> 105 J.</u>
The enthalpy of fusion of a substance additionally referred to as heat of fusion is the alternate in its enthalpy resulting from imparting electricity, usually heat, to a specific amount of the substance to change its state from a stable to a liquid, at a steady strain.
The heat of fusion is the amount of heat vital to alternate 1 g of a stable to a liquid without a temperature exchange.
The heat of fusion is the strength wished for one gram of a solid to melt without any change in temperature. The heat of vaporization is the energy needed for one gram of a liquid to vaporize (boil) without a trade-in strain.
q = m·ΔHf
= 30 × 3.5
heat <u>= 105 J</u>
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Learn more about the heat of fusion here:-brainly.com/question/10403033
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I think it is A but I am not sure