Foundation
Chemistry Foundation
Atom Representation and subatomic particles
Question
The structure of the sodium atom is shown in the figure given alongside. Identify the correct statement.
Sodium has atomic no. .........................
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Solution
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.