2.7 ElectronConfigurationwksht

2.7 ElectronConfigurationwksht - Name: Kenny Xie Date:...

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Name: Kenny Xie Date: 6/16/11 Student Exploration: Electron Configuration Vocabulary: atomic number, atomic radius, Aufbau principle, chemical family, diagonal rule, electron configuration, Hund’s rule, orbital, Pauli exclusion principle, period, shell, spin, subshell Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. Elvis Perkins, a rather shy fellow, is getting on the bus shown at right. Which seat do you think he will probably sit in? Mark this seat with an “E.” In the back, to the driver’s right 2. Marta Warren gets on the bus after Elvis. She is tired after a long day at work. Where do you think she will sit? Mark this seat with an “M.” Near the front, probably one of the front 2 seats 3. In your experience, do strangers getting on a bus like to sit with other people if there is an empty seat available? no Gizmo Warm-up Just like passengers getting on a bus, electrons orbit the nuclei of atoms in particular patterns. You will discover these patterns (and how electrons sometimes act like passengers boarding a bus) with the Electron Configuration Gizmo™.
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To begin, check that Lithium is selected on the PERIODIC TABLE tab. 1. The atomic number is equal to the number of protons in an atom. How many protons are in a lithium atom? 3 2. A neutral atom has the same number of electrons and protons. How many electrons are in a neutral lithium atom? 3 3. Select the ELECTRON CONFIGURATION tab. Click twice in the 1s box at upper left and once in the 2s box. Observe the atom model on the right. A. What do you see? 3 electrons - 2 in the first energy shell, 1 in the second. B. Click Check . Is this electron configuration correct? Yes
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Activity A: Small atoms Get the Gizmo ready : On the PERIODIC TABLE tab, select H (hydrogen). Select the ELECTRON CONFIGURATION tab. Click Reset . Introduction: Electrons are arranged in orbitals , subshells , and shells . These levels of organization are shown by the boxes of the Gizmo. Each box represents an orbital. The subshells are labeled with letters ( s , p , d , and f ) and the shells are labeled with numbers. Question: How are electrons arranged in elements with atomic numbers 1 through 10? 1. Infer : Based on its atomic number, how many electrons does a hydrogen atom have? 1 2. Arrange : The Aufbau principle states that electrons occupy the lowest-energy orbital. Click once in the 1s box to add an electron to the only orbital in the s subshell of the first shell. Click Check . What is the electron configuration of hydrogen? 1s1 3. Arrange : Click Next element to select helium. Add another electron to the 1s orbital. The arrows represent the spin of the electron. What do you notice about the arrows? one arrow points up, while the other points down
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2.7 ElectronConfigurationwksht - Name: Kenny Xie Date:...

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