cava chem 303 s1 2.11 the Bohr Atom
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| show | J.J. Thomson suggested a "plum pudding model" for the atom. In this model, negatively charged electrons were swimming in a sea of positive charges
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| Ernest [...], with his gold-foil experiments, confirmed that there was a centralized nucleus. | show 🗑
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| Niels Bohr was a student of [...]'s in the early 1900s. | show 🗑
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| show | In 1913, Bohr changed the model of the atom. Most of his changes were based on new ideas about how atoms absorb or give off light.
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| Bohr suggested that electrons are found in [...] paths around the nucleus. | show 🗑
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| Bohr's model confines an electron to a distinct orbit around the nucleus. Each of these orbits is a certain distance away from the nucleus; electrons in the orbits farther from the nucleus have [...] energy than those closer to the nucleus. | show 🗑
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| The distinct orbital pathways of electrons are called [...] in chemistry. | show 🗑
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| Nowadays, orbitals (electron pathways) are grouped into shells and subshells. Unfortunately, people (K12 included) sometimes get sloppy and refer to shells or subshells as [...]… sorry. | show 🗑
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| In Bohr's model, electrons have a certain, set amount of [...]. | show 🗑
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| An orbital SHELL is also called an [...] level. Within that shell are subshells and within those subshells are orbitals (the actual pathways of electrons). | show 🗑
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| in the Bohr atom each electron is at a specific or discrete distance from the nucleus. Each resides in one of a series of fixed [...] around the nucleus. | show 🗑
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| show | Electrons in a Bohr atom exist at specific energy levels. They cannot reside between energy levels.
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| Generally speaking, electrons residing in orbitals closer to the nucleus are at a [...] energy level. Electrons in orbitals farther from the nucleus are at a [...] energy level | show 🗑
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| show | It is possible for an electron to change orbitals, or energy levels. But that change has to be a very specific change. An electron would have to gain or lose exactly the right amount of energy
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| For an electron to move farther from the nucleus, it must [...] energy. | show 🗑
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| Chloroplasts absorb energy from sunlight, causing [...] to move to higher orbitals within the plant cells. | show 🗑
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| show | For an electron to move closer to the nucleus, it must release energy.
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| show | The light given off by fireflies is the result of electrons emitting energy (as light) as they move to lower energy levels. This is also how lightbulbs work.
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| show | One way to talk about the energy needed to move an electron from one level to another is to refer to a quantum of energy. A quantum is a discrete amount of energy.
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| You may have heard the expression quantum leap used to refer to a sudden or discrete change. That expression comes from the Bohr model in which electrons jump to one level of energy or another but nowhere in [...]. | show 🗑
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| show | A valence electron is any electron located in the outermost electron SHELL.
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| The valence electrons are the ones that interact or are transferred to other atoms during chemical reactions because (duh) they are the ones that come into contact with the [...] world. | show 🗑
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| The valence electrons are the electrons in the [...]-most electron SHELL. | show 🗑
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