Question

Elements having 5, 6, 7 valency electrons are

• A. P, S, Cl
• B. P, Cl, Na
• C. P, Cl, S
• D. P, S, Na

Answer 1

The Correct Option is A

To solve the problem of identifying elements with 5, 6, or 7 valency electrons, it's crucial to understand the concept of valency and electron configuration.

The valency of an element refers to its ability to bond with other atoms, determined by its outermost electrons (valence electrons). Elements with 5, 6, or 7 valency electrons are typically nonmetals found in Groups 15-17 of the periodic table.

Let's examine the elements given in the options:

• P (Phosphorus): Located in Group 15, has 5 valence electrons.
• S (Sulfur): Located in Group 16, has 6 valence electrons.
• Cl (Chlorine): Located in Group 17, has 7 valence electrons.
• Na (Sodium): Located in Group 1, has 1 valence electron, making it unsuitable for this query.

By evaluating the provided options:

• P, S, Cl → Correct. Each element falls within the 5-7 valency electron range.
• P, Cl, Na → Incorrect. Na has only 1 valence electron.
• P, Cl, S → Correct. Reordering doesn't change correctness, but matches first option anyway.
• P, S, Na → Incorrect. Na is not in the 5-7 valency electron range.

Thus, the correct answer is P, S, Cl, as all these elements have the required number of valency electrons.

Answer 2

Explanation:

We need to find elements with 5, 6, and 7 valence electrons.

• Phosphorus (P) → Atomic number 15 → Electronic configuration: 2, 8, 5 
• Sulfur (S) → Atomic number 16 → Electronic configuration: 2, 8, 6 
• Chlorine (Cl) → Atomic number 17 → Electronic configuration: 2, 8, 7 
• Sodium (Na) → Atomic number 11 → Electronic configuration: 2, 8, 1 

Correct Answer: P, S, Cl