9. Distinguish between the ground state and the excited state of an atom. Ground state – Excited state – For each of the following electron configurations of neutral atoms, determine if the configuration as written is the ground state, an excited state, or if it is an impossible configuration. a. 1s22s22p4 b. 1s22s32p6 c. 1s22s22p53s1 10.
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Problem: How many core and valence electrons does an atom of bromine possess? A. 18 core, 17 valence B. 28 core, 7 valence C. 30 core, 5 valence D. 20 core, 15 valence E. 10 core, 25 valence
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31 What is the total number of valence electrons in a germanium atom in the ground state? (1) 22 (3) 32 (2) 2 (4) 4: 4: link : 2-8-18-4 <----last number of the electron configuration on the Periodic table. 32 Which element is paired with an excited-state electron configuration for an atom of the element? (1) Ca: 2-8-8-2 (2) Na: 2-8-2
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The electron configuration of an atom is 1s 2 2s 2 2p 6. The number of electrons in the atom is The number of electrons in the atom is answer choices
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All atoms have electrons. An atom of hydrogen has only one electron, whereas an atom of calcium has 20 electrons. No matter what the atom is, the orbital structure is the same. In class we will learn how to use the periodic table to remember the orbital structure, and then write it using the shorthand notation of electron configurations.
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2 In the ground state, an atom of which element has two valence electrons? (1) Cr (3) Ni (2) Cu (4) Se: 3: link: last number in an electron configuration: 3 The atoms in a sample of an element are in excited states. A bright-line spectrum is produced when these atoms (1) absorb energy (3) emit energy (2) absorb positrons (4) emit positrons: 3: Link