Here are the correct numbers of valence electrons for each element based on their group number:
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Sulfur (S) - 6 valence electrons (Group 6A)
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Krypton (Kr) - 8 valence electrons (Group 8A, noble gas)
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Rubidium (Rb) - 1 valence electron (Group 1A)
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Silicon (Si) - 4 valence electrons (Group 4A)
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Nitrogen (N) - 5 valence electrons (Group 5A)
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Radium (Ra) - 2 valence electrons (Group 2A)
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Fluorine (F) - 7 valence electrons (Group 7A)
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Thallium (Tl) - 3 valence electrons (Group 3A)
So the matches are as follows:
- Sulfur (S) - 6 valence electrons
- Krypton (Kr) - 8 valence electrons
- Rubidium (Rb) - 1 valence electron
- Silicon (Si) - 4 valence electrons
- Nitrogen (N) - 5 valence electrons
- Radium (Ra) - 2 valence electrons
- Fluorine (F) - 7 valence electrons
- Thallium (Tl) - 3 valence electrons