Question:
Which of the following contains 10 electrons, 11 protons, and 12 neutrons?
Which of the following contains 10 electrons, 11 protons, and 12 neutrons?
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The number of protons determines the element, and the mass number is the sum of protons and neutrons.
Updated On: May 14, 2025
- \( ^{23}_1\text{Na}^+ \)
- \( ^{23}_1\text{Na} \)
- \( ^{22}_1\text{Na} \)
- \( ^{20}_1\text{Ne}^+ \)
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The Correct Option is A
Solution and Explanation
The atom with 11 protons is sodium (\( \text{Na} \)) with an atomic number 11. The mass number is the sum of protons and neutrons:
\[
\text{Mass number} = 11 + 12 = 23
\]
Thus, the atom is \( ^{23}_1\text{Na} \). Since it has 10 electrons, it must be ionized and is \( ^{23}_1\text{Na}^+ \).
Thus, the correct answer is Option 1.
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