Electronic configuration of metals and non-metals

This type of question, asked 4 times: 2022, 2023, 2024, 2025. All 4 questions below, oldest first.

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Question 1
2022
2 $The atomic number of an element ‘X’ is 11. (i) Write the electronic configurations of X and find its valency. (ii) Write the formula and nature of its oxide.$
Question 2
2023
6 $The number of electrons in the outermost shell of the atom of a non-metal can be :$
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Question 3
2024
2 $The number of shells required to write the electronic configuration of Potassium (At. No. 19)$
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Question 4
2025
3 $An element ‘M’ has 25% of the electrons filled in the third shell as in the second shell. The element ‘M’ is :$
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Question 1