Q. Given below are the atomic numbers of some group 14 elements. The atomic number of the element with lowest melting point is :
A) 6
B) 82
C) 14
D) 50
Explanation
[Solution by Dr. Abubacker] The group 14 elements here are C (6), Si (14), Sn (50) and Pb (82). Carbon and silicon have very high melting points (covalent networks); tin melts at about 232 °C, lower than lead (about 327 °C). The lowest is tin, Z = 50. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.