Question
Download Solution PDFIdentify the last element from the fifth period.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is Xenon.
Key Points
- The fifth period of the periodic table consists of 18 elements, starting from Rubidium (Rb) and ending with Xenon (Xe).
- Helium (He) is the first element in the periodic table and is located in the first period. It is not a part of the fifth period.
- Yttrium is the first d-block element in the fifth period.
- Rubidium (Rb) is the first element in the fifth period and has an atomic number of 37.
- Xenon (Xe) is the last element in the fifth period and has an atomic number of 54. Therefore, the correct answer is option 4.
Additional Information
- Helium (He) is a noble gas and is the second most abundant element in the universe after hydrogen. It is used in cryogenics, welding, and as a coolant in nuclear reactors.
- Yttrium (Y) is a rare earth metal and is used in various applications such as lasers, superconductors, and as a component in alloys.
- rubidium (Rb) is a soft, silvery-white metal and is highly reactive. It is used in the production of photocells, as a catalyst in chemical reactions, and in atomic clocks.
- Xenon (Xe) is a noble gas and is used in various applications such as lighting, anesthesia, and in ion propulsion systems for spacecraft. It is also used in research as a contrast agent for medical imaging.
Last updated on Jun 13, 2025
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