Each atom of Rubidium (Rb) has 37 protons.
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The element Rb (Rubidium) is in period 5 of the periodic table.
Germanium has 32 protons.
It tells you (1) how many protons are in the element, and (2) what the element is since all atoms of an element will have the same number of protons.It's D. The number of protons in its atoms.It tells how many protons/electrons that element has.
57, the number of protons determines the elements number.
Element X with 72 protons will have 72 electrons in a neutral state. The number of protons in an element is equal to the number of electrons in that element's neutral atom.