Question
Download Solution PDFThere are four elements P, Q, R and S and their atomic numbers are 2, 6, 13 and 18, respectively. Which of the following pairs has elements having similar valency?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is P and S.
Key Points
- Valency is defined as the combining capacity of an atom.
- The number of bonds that an atom can form as part of a compound is expressed by the valency of the element.
- Here, the electronic configuration says the valency of a particular atom
- Thus, in the given atoms electronic configuration is
- P->1,1
- Q->2,4
- R-2,8,2,1
- S->2,8,2,6
- Therefore, the atoms P and S has same valency i.e. one electron in its outermost shell.
Additional Information
- Valency also indicates the number of atoms with which an particular atom can form covalent bond with the other atom.
- This concept is very important as it determines how strong the bond can be.
- It also helps to find how atoms join together to form molecules.
Last updated on Jul 18, 2025
-> A total of 1,08,22,423 applications have been received for the RRB Group D Exam 2025.
-> The RRB Group D Exam Date will be announced on the official website. It is expected that the Group D Exam will be conducted in August-September 2025.
-> The RRB Group D Admit Card 2025 will be released 4 days before the exam date.
-> The RRB Group D Recruitment 2025 Notification was released for 32438 vacancies of various level 1 posts like Assistant Pointsman, Track Maintainer (Grade-IV), Assistant, S&T, etc.
-> The minimum educational qualification for RRB Group D Recruitment (Level-1 posts) has been updated to have at least a 10th pass, ITI, or an equivalent qualification, or a NAC granted by the NCVT.
-> Check the latest RRB Group D Syllabus 2025, along with Exam Pattern.
-> The selection of the candidates is based on the CBT, Physical Test, and Document Verification.
-> Prepare for the exam with RRB Group D Previous Year Papers.