I have placed an electron at the origin. The grid spacing is 1 Angstrom per small square. Now you have a nucleus with 11 protons at x = 2.9 Angstroms on the x-axis. How much work would it take to bring in ANOTHER nucleus with 14 protons from 1 m away and place it at y = 2.3 Angstroms on the y-axis?

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