It's your choice.Test you chemistry IQ! Answer the following questions about elements and the periodic table.1. Name that element! -- 2. Which of the following elements is NOT a noble gas? A Helium (He) B Xenon (Xe) C Fluorine fluorine (fl  `ərēn, –rĭn), gaseous chemical element; symbol F; at. no. 9; at. wt. 18.998403; m.p. −219.6°C;; b.p. −188.14°C;; density 1. (F)
D Argon (Ar) 3. The atomic number of zirconium zirconium (zərkō`nēəm), metallic chemical element; symbol Zr; at. no. 40; at. wt. 91.22; m.p. about 1,852°C;; b.p. 4,377°C;; sp. gr. 6.5 at 20°C;; valence +2, +3, or +4. (Zr) is --. A 13 B 40 C 74 D 83 4. An atom of which of the following elements has 24 protons? A Chromium (Cr) B Polonium polonium (pəlō`nēəm), radioactive chemical element; symbol Po; at. no. 84; mass no. of most stable isotope 209; m.p. 254°C;; b.p. 962°C;; sp. gr. about 9.4; valence +2 or +4. (Po) C Terbium terbium (tûr`bēəm) [from Ytterby, a village in Sweden], metallic chemical element; symbol Tb; at. no. 65; at. wt. 158.9254; m.p. 1,356°C;; b.p. 3,123°C;; sp. gr. about 8.25; valence +3 or +4. (Tb) D Magnesium (Mg) 5. What is aluminum's (Al) atomic mass? A 10.81 B 26.982 C 30.974 D 72.59 6. What element has the letters "Sb" as its symbol? A Antimony B Seaborgium seaborgium (sēbôr`gēəm), artificially produced radioactive chemical element; symbol Sg; at. no. 106; mass number of most stable isotope 266; m.p., b.p., sp. gr., and valence unknown. C Selenium D Mercury [ILLUSTRATION OMITTED] Answer Key: 1. Nickel 2. c 3. b 4. a 5. b 6. a |
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