| Question 1: For example, the long-known sugar ________ is now systematically named 6-(hydroxymethyl)oxane-2,3,4,5-tetrol. | |||
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| Question 2: CAS provides the abstracting services of the chemical literature, and provides a numerical identifier, known as ________ to each chemical substance that has been reported in the chemical literature (such as chemistry journals and patents). | |||
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| Question 3: Generally, chemical substances exist as a solid, liquid, ________, or plasma and may change between these phases of matter with changes in temperature or pressure. | |||
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| Question 4: ________ convert one chemical substance into another. | |||
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| Question 5: An element is a chemical substance that is made up of a particular kind of atoms and hence cannot be broken down or transformed by a chemical reaction into a different element, though it can be transmutated into another element through a ________. | |||
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| Question 6: Non-metals lack the metallic properties described above, they also have a high ________ and a tendency to form negative ions. | |||
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| Question 7: The ________ of a "chemical substance" became firmly established in the late eighteenth century after work by the chemist Joseph Proust on the composition of some pure chemical compounds such as basic copper carbonate. | |||
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| Question 8: No chemical process occurs, and the material can be identified as a mixture by the fact that the sulfur and the iron can be separated by a mechanical process, such as using a ________ to attract the iron away from the sulfur. | |||
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| Question 9: These are elements with a characteristic lustre such as iron, ________, and gold. | |||
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| Question 10: There are about 120 known elements, about 80 of which are stable - that is, they do not change by ________ into other elements. | |||
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