Question

Which of the following statement is INCORRECT with p-block elements?

• A. p-Block elements comprise of Group \( 13 \) to Group \( 18 \).
• B. The outer electronic configuration of p-block elements is \( ns^2\,np^{1-6} \).
• C. Halogens belongs to Group \( 16 \).
• D. Gallium and Bromine are liquids.
• E. The zero group elements having general formula \( ns^2p^6 \) are inert, because their energy levels are completely filled.

Hint:

Remember the p-block groups: \[ 13,14,15,16,17,18 \] and specifically: \[ \text{Group 17 = Halogens}, \qquad \text{Group 18 = Noble gases} \]

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
This question tests fundamental knowledge about the p-block elements in the periodic table, including their position, electronic configuration, group names, and properties. We need to identify the statement that is factually incorrect.
Step 2: Detailed Explanation:
Let's evaluate each statement:

(A) p-Block elements comprise of Group 13 to Group 18: This is the correct definition of the p-block in the periodic table. The p-subshell is progressively filled from Group 13 (p\(^1\)) to Group 18 (p\(^6\)). This statement is correct.

(B) The outer electronic configuration of p-block elements is ns\(^2\) p\(^{1-6}\): This is the general valence shell electronic configuration for p-block elements. The 'n' represents the principal quantum number of the outermost shell. This statement is correct.

(C) Halogens belongs to Group 16: This is incorrect. The Halogens (Fluorine, Chlorine, Bromine, Iodine, Astatine) are the elements of Group 17. Their general valence configuration is ns\(^2\)np\(^5\). Group 16 elements are called Chalcogens (Oxygen family). This statement is INCORRECT.

(D) Gallium and Bromine are liquids: This is a factual statement about the physical states of elements. Gallium has a low melting point (29.76 °C) and is liquid on a warm day. Bromine is one of only two elements (the other being mercury) that are liquid at standard temperature and pressure. This statement is correct.

(E) The zero group elements having general formula ns\(^2\)p\(^6\) are inert...: Group 18 elements (Noble gases or zero group) have a completely filled valence shell (ns\(^2\)np\(^6\), except for He which is 1s\(^2\)). This stable configuration makes them chemically inert or unreactive. This statement is correct.

Step 3: Final Answer:
The incorrect statement is (C) because Halogens belong to Group 17, not Group 16.