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Question

The structure of the sodium atom is shown in the figure given alongside. Identify the correct statement.
Sodium has atomic no. .........................
443871.png

A
11
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B
12
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C
23
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D
10
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Solution

The correct option is A 11
Atomic number (z) is the number of protons in an atom. It is also equal to the number of electrons in the atom.
Atomic number = number of protons
So, in this case, the atomic number is 11 which is equal to no. of protons in the nucleus.

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