Question

Which of these elements forms a cation having pseudo noble gas configuration.
(A) Mg
(B) Ga
(C) K
(D) AI
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Answer 1

Explanation:

Follow the steps below to write short cut version of electron configurations.

Step 1: Find the element on the periodic table.

Step 2: Go back to the last noble gas that was passed (atomic number).

Step 3: Write the symbol of the noble gas in brackets to start your electron configuration.

Answer 2

$\huge{\mathfrak{\underline{\green{AnSwEr}}}}$

Elements that form a cation will be

•°• Potassium