Sulfur (32.065)
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Sulphur
The element with an atomic weight of 121.75 is antimony, with the chemical symbol Sb.
The protons and neutrons are the main contributors to the weight of an atomic element.
sulfur
The element with an atomic weight of 165 is Holmium, which has the chemical symbol Ho and atomic number 67. It is a rare earth metal that is commonly used in various applications such as magnets and nuclear reactors.