Which of the following reasons explains why sulfur (S) will have larger ionization energy than aluminum (Al)? A. Sulfur experiences less electron shielding than aluminum.
B. Sulfur has larger protons and thus, can hold its electrons more tightly.
C. Sulfur has more protons in its nucleus and thus, holds its electrons more tightly.
D. Sulfur has fewer protons in its nucleus and thus, holds its electrons loosely.

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ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.