If the number of electrons is 10 for a sodium ion, write the symbol, the number of electrons gained/lost and the number of protons of thus newly formed ion.

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Solution

An atomic number is the number of protons of an atom.
An electrically neutral atom will have an equal number of electrons and protons.
The electronic configuration is the arrangement of electrons in different energy levels around the nucleus of an atom.
The atomic number and number of electrons of a neutral sodium atom is 11.
Electronic configuration of Na:2,8,1.
If the number of electrons is 10 means the sodium atom has lost one electron.
It will thus form a Na⁺¹ ion.
The new electronic configuration:2,8.
The number of protons does not depend upon gaining or losing electrons, thus it will be 11.

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