The element with an atomic number of 51 is Sb - Antimony; atomic weight = 121.75.
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The average atomic mass of iron is approximately 55.85 atomic mass units (amu). This value is calculated based on the natural abundance of its isotopes, primarily iron-56.
This atom has 26 neutrons and an atomic mass of 48, giving it an atomic number of 22 (since atomic mass - number of neutrons = number of protons). The element with atomic number 22 is Titanium (Ti).
The atomic mass of magnesium is approximately 24.305 amu (atomic mass units).
Element A has a greater atomic mass than element B if the atomic mass value of A is higher. The atomic mass represents the average mass of an element’s isotopes based on their abundance in nature.
The element with atomic mass 131 is Iodine (I)