An atom of element a has 39 protons. what would the element’s atomic number be?

39

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Atomic Mass88.90585 atomic mass units

Number of Protons39

Number of Neutrons50

Number of Electrons39

because growing process had stoped after 4-5 year

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.