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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


Answer Key: 1. Nickel 2. c 3. b 4. a 5. b 6. a
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Publication:Science World
Geographic Code:1USA
Date:Jan 12, 2009
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