Multiple Choice
What is the valence electron configuration for the silicon atom?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
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How many valence electrons are represented around the Lewis symbol for a selenium (Se) atom?
A
2
B
6
C
8
D
4
Verified step by step guidance1
Identify the group number of selenium (Se) in the periodic table. Selenium is in group 16 (or VIA), which helps determine its number of valence electrons.
Recall that elements in group 16 have 6 valence electrons because the group number corresponds to the number of electrons in the outermost shell for main-group elements.
Understand that the Lewis symbol represents valence electrons as dots placed around the chemical symbol of the element. Each dot corresponds to one valence electron.
Draw the Lewis symbol for selenium by placing 6 dots around the symbol 'Se'. These dots are usually arranged in pairs on four sides (top, bottom, left, right) around the element symbol.
Conclude that the number of valence electrons represented around the Lewis symbol for selenium is 6, matching its group number and valence electron count.
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