Scelta multipla
Which of the following Lewis structures is the most important (major resonance contributor) for the fulminate ion, CNO⁻?
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11. Bonding & Molecular Structure
Lewis Dot Structures: Ions
Scelta multipla
Which of the following represents the correct Lewis dot structure for the Ca^{2+} ion?
A
Ca^{2+} with two dots
B
Ca^{2+} with eight dots
C
Ca^{2+} with six dots
D
Ca^{2+} with no dots
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Recall that Lewis dot structures represent the valence electrons of an atom or ion as dots around the chemical symbol.
Identify the number of valence electrons in a neutral calcium (Ca) atom. Calcium is in group 2 of the periodic table, so it has 2 valence electrons.
Consider the charge on the ion: Ca^{2+} means the calcium atom has lost 2 electrons.
Since the Ca^{2+} ion has lost its 2 valence electrons, it will have zero valence electrons to represent in the Lewis dot structure.
Therefore, the correct Lewis dot structure for Ca^{2+} is the symbol 'Ca^{2+}' with no dots around it.
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