Which of the following statements is true?

a. A piece of magnesium is made only of magnesium atoms.
b. All 118 elements occur naturally on Earth.
c. Protons and neutrons orbit the nucleus of an atom.(i picked this one and it was wrong)
d. Electrons are found in the nucleus.

What amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees celsius to a solid at the same temperature? melting point of substance y = 35 degrees c; δhvaporization = 3.67 j/mol; δhfusion = 3.30 j/mol. mwsubstance y = 28.22 g/mol. −12.4 j −3.51 x 102 j 1.24 x 101 j 351 j