Question

Write the charge and full ground-state electron configuration of the monatomic ion most likely to be formed by each:

Answer 1

Answer:

For a: The charge on the ion formed is +3

For b: The charge on the ion formed is -2

For c: The charge on the ion formed is +2

Explanation:

An ion is formed when an atom looses or gains electron.

• When an atom looses electrons, it will form a positive ion known as cation.
• When an atom gains electrons, it will form a negative ion known as anion.

For the given options:

• Option a:  Al

Aluminium is the 13th element of the periodic table having electronic configuration of $1s^22s^22p^63s^23p^1$

This element will loose 3 electrons to form $Al^{3+}$ ion

The charge on the ion formed is +3

• Option b:  S

Sulfur is the 16th element of the periodic table having electronic configuration of $1s^22s^22p^63s^23p^4$

This element will gain 2 electrons to form $S^{2-}$ ion

The charge on the ion formed is -2

• Option c:  Sr

Strontium is the 38th element of the periodic table having electronic configuration of $1s^22s^22p^63s^23p^64s^23d^{10}4p^65s^2$

This element will loose 2 electrons to form $Sr^{2+}$ ion

The charge on the ion formed is +2