Questions: Which of the following is not a valid Lewis symbol? I II III IV

Which of the following is not a valid Lewis symbol? I II III IV
Transcript text: Which of the following is not a valid Lewis symbol? I II III IV
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Solution

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Solution Steps

Step 1: Understanding Lewis Symbols

Lewis symbols represent the valence electrons of an element. Each dot around the symbol of an element represents one valence electron. The number of dots corresponds to the number of valence electrons in the outermost shell of an atom.

Step 2: Analyzing the Options

To determine which option is not a valid Lewis symbol, we need to consider the typical valence electron configurations for elements:

  • I: Typically represents an element with one valence electron, such as Hydrogen (H) or any alkali metal.
  • II: Represents an element with two valence electrons, such as Helium (He) or any alkaline earth metal.
  • III: Represents an element with three valence electrons, such as Boron (B) or elements in group 13.
  • IV: Represents an element with four valence electrons, such as Carbon (C) or elements in group 14.
Step 3: Identifying the Invalid Lewis Symbol

Each of the options I, II, III, and IV corresponds to a valid Lewis symbol for elements with 1, 2, 3, and 4 valence electrons, respectively. Therefore, all options provided are valid Lewis symbols.

Final Answer

\(\boxed{\text{None of the options is invalid; all are valid Lewis symbols.}}\)

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