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The correct answer is Mercury . Key Points Mercury is the odd one out as it is the only element in the list that is a liquid metal at room temperature (approximately 20°C to 25°C). It is a chemical element with the symbol Hg and atomic number 80, commonly known as quicksilver. Mercury is unique among metals due to its liquid state at room temperature, while Iron, Silver, and Gold are all solid metals under normal conditions. Mercury is a heavy metal and is toxic to humans and the environment, often requiring careful handling and disposal. It is primarily used in thermometers, barometers, fluorescent lighting, and certain electrical devices, although its usage has declined due to health and safety concerns. Additional Information Iron (Fe): Iron is a chemical element with the symbol Fe and atomic number 26. It is a solid metal at room temperature and is known for its strength, malleability, and ductility. Iron is one of the most abundant elements on Earth and is commonly used in construction (steel production), machinery, and tools. It is an essential element for life, playing a critical role in oxygen transport in the blood (hemoglobin). Silver (Ag): Silver is a chemical element with the symbol Ag and atomic number 47. It is a solid metal at room temperature, known for its exceptional thermal and electrical conductivity. Silver is widely used in jewelry, tableware, electronics, and photography. It is also valued for its antimicrobial properties and is used in medical applications. Gold (Au): Gold is a chemical element with the symbol Au and atomic number 79. It is a solid metal at room temperature, notable for its malleability, ductility, and resistance to corrosion. Gold is widely used in jewelry, electronics, and as a monetary standard (investment and reserves). It is also a symbol of wealth and has cultural significance in many societies.
The correct answer is Mercury..
It is a chemical element with the symbol Hg and atomic number 80, commonly known as quicksilver.
Mercury is unique among metals due to its liquid state at room temperature, while Iron, Silver, and Gold are all solid metals under normal conditions.
Mercury is a heavy metal and is toxic to humans and the environment, often requiring careful handling and disposal.
It is primarily used in thermometers, barometers, fluorescent lighting, and certain electrical devices, although its usage has declined due to health and safety concerns.:
Iron is a chemical element with the symbol Fe and atomic number 26.
It is a solid metal at room temperature and is known for its strength, malleability, and ductility.
Iron is one of the most abundant elements on Earth and is commonly used in construction (steel production), machinery, and tools.
It is an essential element for life, playing a critical role in oxygen transport in the blood (hemoglobin).
Silver (Ag):
Silver is a chemical element with the symbol Ag and atomic number 47.
It is a solid metal at room temperature, known for its exceptional thermal and electrical conductivity.
Silver is widely used in jewelry, tableware, electronics, and photography.
It is also valued for its antimicrobial properties and is used in medical applications.
Gold (Au):
Gold is a chemical element with the symbol Au and atomic number 79.
It is a solid metal at room temperature, notable for its malleability, ductility, and resistance to corrosion.
Gold is widely used in jewelry, electronics, and as a monetary standard (investment and reserves).
It is also a symbol of wealth and has cultural significance in many societies.
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