Which element is the first element in group 13 of the periodic table?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. Boron.
Boron (B) is the first element in Group 13 of the periodic table, also known as the boron group. It has an atomic number of 5 and is unique because it is a metalloid, meaning it has properties of both metals and non-metals. Group 13 elements have three valence electrons, making them trivalent and capable of forming covalent bonds. The other elements in this group—aluminium, gallium, indium, and thallium—are all metals. Boron is used in various applications such as glassmaking, detergents, and semiconductors. Its chemical behavior sets the foundation for understanding trends within the entire group.