Multiple Choice
Which of the following best describes the Lewis dot structure for XeF_4 (xenon tetrafluoride)?
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11. Bonding & Molecular Structure
Lewis Dot Structures: Neutral Compounds
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Which of the following represents the correct Lewis dot structure for a neutral strontium (Sr) atom?
A
Sr with four dots, two on each side
B
Sr with eight dots surrounding the symbol
C
Sr with no dots
D
Sr with two dots, one on each side
Verified step by step guidance1
Recall that Lewis dot structures represent the valence electrons of an atom as dots placed around the element's symbol.
Determine the number of valence electrons for strontium (Sr). Strontium is in Group 2 of the periodic table, so it has 2 valence electrons.
Place the valence electrons as dots around the symbol Sr. According to Lewis notation, place one dot on each of two different sides of the symbol to represent the two valence electrons.
Verify that the total number of dots equals the number of valence electrons, which is 2 for Sr, confirming the correct Lewis dot structure.
Understand that placing four or eight dots would incorrectly represent the number of valence electrons, and no dots would imply zero valence electrons, which is not correct for Sr.
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