QQuestionChemistry
QuestionChemistry
How many valence electrons does a sodium, silicon, beryllium, and oxygen atom have?
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Answer
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Step 1
First, let's determine the number of valence electrons for each atom step by step: - Sodium (Na): Sodium is in the 1st column of the 3rd row of the periodic table. The number of valence electrons is equal to the group number, which is 1 for hydrogen and 1 - 18 for the other elements in the table. So, sodium has 1 valence electron. - Silicon (Si): Silicon is in the 14th column of the 4th row. Therefore, it has 4 valence electrons. - Beryllium (Be): Beryllium is in the 2nd column of the 2nd row, so it has 2 valence electrons. - Oxygen (O): Oxygen is in the 16th column of the 2nd row, so it has 6 valence electrons.
Step 2
Final Answer
- Sodium (Na) has 1 valence electron. - Silicon (Si) has 4 valence electrons. - Beryllium (Be) has 2 valence electrons. - Oxygen (O) has 6 valence electrons.
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