What is the atomic number of the element Gallium?
31
The atomic number of an element is the number of protons in the nucleus of its atom.
Gallium (symbol Ga) is a soft, silvery metal placed in Group 13 of the periodic table, just below aluminium.
Each gallium atom has 31 protons, so its atomic number is 31 and its electronic configuration is [Ar] 3d10 4s2 4p1.
Gallium is notable for melting at about 29.8 °C, so it can melt in the palm of the hand.
Hence, 31.
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