Question 6.8: Use the periodic table to determine the electron configurati......

Chemistry for Engineering Students [987733]

Use the periodic table to determine the electron configuration of tungsten (W), which is used in the filaments of most incandescent lights.

Strategy Begin by finding tungsten in the periodic table. Use the rare gas element from the previous period to abbreviate the core electrons. Then determine the correct valence electron configuration by counting across the period in which tungsten is located.

periodic table

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The rare gas element preceding tungsten is xenon. When counting the valence electrons, don’t forget the f-block elements. The correct configuration is [Xe] $6s^24f^{14}5d^4$ .

Check Your Understanding Mercury is used in fluorescent lamps as well as in mercury vapor lamps. Use the periodic table to determine the electron configuration of mercury (Hg).

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