It's elemental!Name: -- DIRECTIONS: First, read "Name That Element!" (p. 22). Then, solve the clues below to complete this crossword puzzle. To spell out the bonus words, unscramble Same as decrypt. See scramble. the letters in parentheses See parenthesis. parentheses - See left parenthesis, right parenthesis. . [ILLUSTRATION OMITTED] ACROSS 1. A highly -- chemical combines easily with other elements. 2. In its pure state, flourine is a greenish -- gas. 3. The atomic number atomic number, often represented by the symbol Z, the number of protons in the nucleus of an atom, as well as the number of electrons in the neutral atom. Atoms with the same atomic number make up a chemical element. equals the number of --in an atom's nucleus. 4. Flourine combines with all other elements except helium, neon, and --. 5. The atomic mass equals the number of protons plus the number of -- found in a single atom of an element. DOWN 6. A once-popular, but ozone-damaging, refrigerant re·frig·er·ant adj. 1. Cooling or freezing; refrigerating. 2. Reducing fever. n. 1. A substance, such as air, ammonia, water, or carbon dioxide, used to provide cooling either as the working substance of contained flourine and the element --. 7. Earth's ozone layer is a protective layer of gas located in the upper --. 8. When -- break down food, they release acids. 9. A -- is made of two or more elements that are chemically combined. 10. A -- is a row on the periodic table. Bonus: Flourine, the thirteenth most abundant element, is released into the environment naturally via (a.) -- and (b.) --. ANSWER: 1. reactive 2. yellow 3. protons 4. argon argon (är`gŏn) [Gr.,=inert], gaseous chemical element; symbol Ar; at. no. 18; at. wt. 39.948; m.p. −189.2°C;; b.p. −185.7°C;; density 1.784 grams per liter at STP; valence 0. 5. neutrons 6. chlorine 7. atmosphere 8. microbes 9. compound 10. period Bonus: a. air b. water |
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