If A=23 and Z=11 for Na atom, how many neutrons are present in Na atom?

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Q.

If A=23 and Z=11 for Na atom, how many neutrons are present in Na atom?

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Q. An atom has mass number $23$ and atomic number $11$. How many protons, electrons and neutrons are present in the atom?

Q. If there $12$ neutrons in an atom and its atomic number is $11$. Then how many electrons are present in it:

Q. How many unit cells are present in a cube-shaped ideal crystal of $NaCl$ of mass $1.00g$ [Atomic masses : $Na=23,Cl=35.5]$.

Q.

How many unit cells are present in a cubic -shaped ideal crystal of NaCl of mass 1.00 g [Atomic masses: Na= 23, Cl = 35.5]