9. i. Suppose 8.5x10-¹⁹ J of work is done to bring the nucleus of an atom from some infinite distance away to a particular location near a fixed positive charge. What would the electric potential energy of the nucleus be? (a) 3.4x10-18 J 18 (b) 1.7x107 J (c) 8.5x10-19 J (d) 4.3x10-19 J (e) None of the above. ii. The nucleus is released an returns to the very far original position. Considering the kinetic energy of the nucleus and a mass of 6.6x10-27 kg, which is closest to the velocity of the nucleus? (a) 1.2x10-⁹ m/s (b) 1600 m/s (c) 11000 m/s (d) 2.5x108 m/s (e) None of the above.

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Atomic Number

Elements are the building blocks of all the matter that exist in the universe. Every element is made up of atoms that have protons, electrons, and a nucleus. In order to know the difference between the elements, an atomic number is used. Every element has its own individual atomic number. The atomic number is a single most important characteristic of an atom.