1. Explain why oxygen atoms are neutral.
2. Compare: an atom’s structure to a ladder. What parts of the ladder correspond to the energy levels of the atom? Identify one way a real ladder is not a good model for the atom.
3.In the early 1900s, two associates of New Zealander Ernest Rutherford bombarded thin sheets of gold with positively charged subatomic particles.
They found that most of the particles passed right through the sheets but some bounced back as if they had hit something solid. Based on their results what do you think the majority of an atom is made of? What part of the atom caused the particles to bounce back?
4. Explain how the path of an electron differs in Bohr’s model and in the modern model of the atom.
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