Which category is composed of elements that have both positive and negative oxidation states?
(1) the alkali metals
(2) the transition metals
(3) the halogens
(4) the alkaline earth metals
When ethylene glycol (an antifreeze) is added to water, the boiling point of the water:
(1) decreases, and the freezing point decreases
(2) decreases, and the freezing point increases
(3) increases, and the freezing point decreases
(4) increases, and the freezing point increases
In a fusion reaction, a major problem related to causing the nuclei to fuse into a single nucleus is the:
(1) small mass of the nuclei
(2) large mass of the nuclei
(3) attractions of the nuclei
(4) repulsions of the nuclei
2007-05-05 15:28:58 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Answer = (3)
The halogens can exist with either positive or negative oxidation states. For example, in the chloride ion, Cl = -1 but in the chlorate ion, Cl = +5. Metals normally have only positive oxidation states.
Answer = (3)
Boiling point elevation and freezing point depression are two examples of colligative properties of solutions.
Answer = (4)
It's very hard to push two nuclei close together so that fusion will occur. Like charges repel each other, so repulsion of the nuclei is the biggest obstacle.
2007-05-05 15:40:22 · answer #1 · answered by mrfarabaugh 6 · 0⤊ 0⤋
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2016-12-17 05:19:05 · answer #2 · answered by keetan 4 · 0⤊ 0⤋
(3)
(3)
(4)
2007-05-05 15:33:02 · answer #3 · answered by steve_geo1 7 · 0⤊ 0⤋