
Least chemical activity is shown by
A) Nitrogen
B) Argon
C) Methane
D) Ammonia
Answer
163.2k+ views
Hint: The chemical activity of an element is decided by the count of valence electrons of an atom. If the valence electron count is 2 or 8, that means the orbit is fully filled, so, in that case, reactivity is less.
Complete Step by Step Solution:
Let's discuss the reactivity of noble gases. They are the elements that belong to the last group of the periodic table. They possess a fully filled outermost shell. Some examples of noble gases are helium, neon, argon, xenon, Krypton, etc. As their valence shell is complete, their reactivity is less. Therefore, they are called inert gases.
Let's discuss argon in detail. Argon belongs to the class of noble gas positioned in the periodic table's 18th group. And it is the noble gas that is abundant on earth. It is 0.00015% of the crust. Its atomic number is 18 and its configuration is 2,8,8. So, it has completely filled the outermost shell. So, its reactivity is less.
Let's discuss other options one by one. Nitrogen is a non-metal and it is reactive in nature as it requires three more electrons to attain stability. Methane and ammonia are also reactive compounds.
Therefore, among the given options, argon is the least reactive.
Hence, option B is right.
Note: Only xenon, among the noble gases, forms a large number of compounds with oxygen and fluorine. This is because of the larger size of the xenon atom. And, due to the large size, there is a weak attraction of the electrons to the nucleus and this helps in compound formation.
Complete Step by Step Solution:
Let's discuss the reactivity of noble gases. They are the elements that belong to the last group of the periodic table. They possess a fully filled outermost shell. Some examples of noble gases are helium, neon, argon, xenon, Krypton, etc. As their valence shell is complete, their reactivity is less. Therefore, they are called inert gases.
Let's discuss argon in detail. Argon belongs to the class of noble gas positioned in the periodic table's 18th group. And it is the noble gas that is abundant on earth. It is 0.00015% of the crust. Its atomic number is 18 and its configuration is 2,8,8. So, it has completely filled the outermost shell. So, its reactivity is less.
Let's discuss other options one by one. Nitrogen is a non-metal and it is reactive in nature as it requires three more electrons to attain stability. Methane and ammonia are also reactive compounds.
Therefore, among the given options, argon is the least reactive.
Hence, option B is right.
Note: Only xenon, among the noble gases, forms a large number of compounds with oxygen and fluorine. This is because of the larger size of the xenon atom. And, due to the large size, there is a weak attraction of the electrons to the nucleus and this helps in compound formation.
Recently Updated Pages
JEE Main 2021 July 25 Shift 1 Question Paper with Answer Key

JEE Main 2021 July 22 Shift 2 Question Paper with Answer Key

JEE Main 2025 Session 2: Exam Date, Admit Card, Syllabus, & More

JEE Atomic Structure and Chemical Bonding important Concepts and Tips

JEE Amino Acids and Peptides Important Concepts and Tips for Exam Preparation

JEE Electricity and Magnetism Important Concepts and Tips for Exam Preparation

Trending doubts
Types of Solutions

Degree of Dissociation and Its Formula With Solved Example for JEE

Classification of Drugs

Instantaneous Velocity - Formula based Examples for JEE

JEE Main Chemistry Question Paper with Answer Keys and Solutions

JEE Main Chemistry Online Mock Test for Class 12

Other Pages
Haloalkanes and Haloarenes

Alcohol Phenol and Ether Class 12 Notes: CBSE Chemistry Chapter 7

Coordination Compounds Class 12 Notes: CBSE Chemistry Chapter 5

NCERT Solutions for Class 12 Chemistry In Hindi Chapter 10 Haloalkanes and Haloarenes In Hindi Mediem

Total MBBS Seats in India 2025: Government College Seat Matrix

NEET Total Marks 2025: Important Information and Key Updates
