Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
Boron is the only metalloid of which group of the periodic table?
Group 13
Group 5
Group 10
Group 16
Group 13
Boron is the first element of Group 13 and acts as the only non-metal/metalloid in this group. While the other members of Group 13тАФAluminum, Gallium, Indium, and ThalliumтАФare classified as post-transition metals, Boron exhibits semi-conducting properties and specific chemical behaviors typical of a metalloid.
Boron is the first element of Group 13 and acts as the only non-metal/metalloid in this group. While the other members of Group 13тАФAluminum, Gallium, Indium, and ThalliumтАФare classified as post-transition metals, Boron exhibits semi-conducting properties and specific chemical behaviors typical of a metalloid.
Think of Boron as a 'bridge player'; it stands on the edge of the staircase between the non-metal world and the metal world, sharing traits with both, much like a person who is bilingual and can communicate with two different groups.
B-Al-Ga-In-Tl: 'Big Ants Give Interesting Tales'
Z=5 тАФ Atomic number of Boron
1s22s22p1 тАФ Electronic configuration of Boron
In the periodic table, diagonal trends and ionization energy variations dictate metallic character. As one moves down a group, the atomic size increases and the valence electrons are held less tightly, leading to an increase in metallic character. Boron, having a small atomic radius (rтЙИ85┬аpm) and high ionization energy, retains covalent bonding characteristics, whereas elements below it transition to metallic bonding.
Boron is classified as a metalloid due to its semiconductor properties.
The remaining elements in Group 13 are considered metals (Aluminum is a poor metal).
Boron has a high melting point (2349┬аK) due to its complex network of covalent bonds.
Boron is essential for plant growth but toxic in high concentrations.
High hardness (Boron carbide is used in tank armor).
Pure boron is difficult to extract from its ores like borax.
Borosilicate glass (Pyrex) used in chemistry labs.
Semi-conductors and control rods in nuclear reactors.
Boron shows diagonal relationship with Silicon.
Option B (Group 5) is actually the Vanadium group, containing transition metals.
Option C (Group 10) contains Nickel, Palladium, and Platinum.
Option D (Group 16) is the Chalcogen group, which contains non-metals, metalloids (like Tellurium), and metals.
A is correct тАФ Boron is the unique metalloid situated at the top of Group 13, separating non-metals from the metallic elements of the group.
Remember that metallic character increases down a group; therefore, the lightest element in a group of metals is most likely to be a non-metal or metalloid.
Get instant step-by-step AI explanations, full shift Previous Year Papers (SSC GD, RRB, SSC JE), and regional rank analysis on the official Examoogle App.
Free Download тАв 100K+ Aspirants