Question
Download Solution PDFWhat is the atomic number of the element gallium?
This question was previously asked in
RPF SI (2018) Official Paper (Held On: 19 Dec, 2018 Shift 1)
Answer (Detailed Solution Below)
Option 1 : 31
Free Tests
View all Free tests >
RPF SI Full Mock Test
120 Qs.
120 Marks
90 Mins
Detailed Solution
Download Solution PDFThe correct answer is 31
Key Points
- Gallium is a chemical element with the symbol Ga and atomic number 31.
- It is a soft, silvery metal at standard temperature and pressure; however, it becomes a liquid at slightly above room temperature.
- Gallium is primarily used in electronics, semiconductors, and as a component in low-melting alloys.
- It is not found in free form in nature but is extracted from bauxite and zinc ores.
Additional Information
- Gallium was discovered by French chemist Paul-Émile Lecoq de Boisbaudran in 1875.
- Its name is derived from the Latin word "Gallia," meaning France.
- Gallium is used in various high-temperature thermometers and barometers due to its low melting point.
- It has a unique property of being able to "wet" glass or porcelain, making it useful in various scientific applications.
Latest RPF SI Updates
Last updated on Jul 16, 2025
-> Indian Ministry of Railways will release the RPF Recruitment 2025 notification for the post of Sub-Inspector (SI).
-> The vacancies and application dates will be announced for the RPF Recruitment 2025 on the official website. Also, RRB ALP 2025 Notification was released.
-> The selection process includes CBT, PET & PMT, and Document Verification. Candidates need to pass all the stages to get selected in the RPF SI Recruitment 2025.
-> Prepare for the exam with RPF SI Previous Year Papers and boost your score in the examination.
Suggested Test Series
View All >