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A single atom of an element has 11 protons, 11 electrons, and 12 neutrons. Which element is it?

A. Na
B. Mg
C. Se

Sagot :

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To determine which element corresponds to an atom with 11 protons, we can use the periodic table of elements. The atomic number of an element is defined by the number of protons in its nucleus. Here are the detailed steps:

1. Identify the Number of Protons:
- The question states that the atom has 11 protons.

2. Locate the Atomic Number on the Periodic Table:
- The periodic table is organized by atomic number, which corresponds to the number of protons in an atom of the element.
- An element with 11 protons has an atomic number of 11.

3. Identify the Element:
- The element that has an atomic number of 11 on the periodic table is Sodium, with the chemical symbol "Na".

Therefore, the element in question is Sodium (Na).
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