SCIENCE
PHYSICAL SCIENCES
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Detailed explanation-1: -Period 3. Explain that sodium has 11 protons and 11 electrons. There are 2 electrons on the first energy level, 8 electrons on the second level, and 1 electron on the third energy level.
Detailed explanation-2: -Explanation: Sodium has an atomic number of 11, which is the number of protons in the nuclei of its atoms. A neutral sodium atom also has 11 electrons.
Detailed explanation-3: -An atom of sodium has 11 protons, 12 electrons, and 11 neutrons.
Detailed explanation-4: -Sodium has 11 electrons arranged in three energy levels. In order to become stable, sodium form an ion with: A.-1 charge.
Detailed explanation-5: -Sodium is an alkali metal having atomic number 11. Therefore, the electronic configuration will be 1 s 2 2 s 2 2 p 6 3 s 1 .