Part C In the PhET simulation, make sure that the checkbox Stable/Unstable in the bottom right is checked. Using the PhET simulation as a reference, determine whether the following combinations of protons and neutrons form stable or unstable nuclei by adding protons and neutrons to the nucleus. Unstable nuclei will shake. If the Stable/Unstable checkbox in the lower right is also checked, the nuclei will be labeled Stable or Unstable. Sort the following combinations of protons and neutrons according to whether or not they form stable or unstable nuclei. Drag the appropriate items to their appropriate bins. ► View Available Hint(s) 2 protons and 0 neutrons Stable proton and 0 neutrons 4 protons and 5 neutrons 1 proton and 2 neutrons protons and 7 neutrons Unstable 6 protons and 5 neutrons 8 protons and 7 neutrons Reset 9 protons and 9 neutrons Help

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.