Download Ground State vs. Excited Electrons and more Summaries Chemistry in PDF only on Docsity! Name____________________________ Date ________________ Period ________________ Page 1 of 4 Ground State vs. Excited Electrons Electron Configuration Identity Ground/Excited 1) 2-8-1 2) 2-8-16-3 3) 2-8-2 4) 2-7-8 5) 1-3 6) 2-8-6 7) -18-32-18-4 8) -18-32-17-3 9) 2-7 10) 1-8 Give an electron configuration for the following (unless it states excited, assume ground state.): 11. Sulfur in its ground state. ______________________ 12. Helium in an excited state. ______________________ 13. Give the ground state electron configuration for calcium. _____________________ 14. Give the correct ground state electron configuration for the Ca+2 ion. ______________________ 15. How many valence electrons are there in atom of bromine? ________ 16. How many valence electrons are there in a Cl- ion? ________ 17. How many kernel electrons are there in a phosphorus atom? ________ 18. How many valence electrons are there in a neon atom? ________ 19. How many principal energy levels are there in an iron atom? ________ Name____________________________ Date ________________ Period ________________ Page 2 of 4 20. When atoms of an element are emitting a certain wavelength (or color) of light, it means that a) the atoms have gained energy and electrons have jumped to an excited state. b) the atoms have gained energy and electrons have fallen back to the ground state. c) the atoms have lost energy and electrons have fallen back to the ground state. d) the atoms have lost energy and electrons have jumped to an excited state. Use the emissions spectra results below to answer questions 21 and 22: 21. According to these experimental spectra results, the unknown gas is a mixture of which gases? ___________ 22. The lines on the visible light spectrum for the gases above represent a) electrons jumping to the same excited state or energy level. b) electrons falling back down to their ground state from the same energy level. c) electrons jumping to multiple excited states or energy levels. d) electrons falling back down to their ground state from multiple energy levels. 23. How do the energy and the most probable location of an electron in the third shell of an atom compare to the energy and the most probable location of an electron in the first shell of the same atom? a) In the third shell, an electron has more energy and is closer to the nucleus. b) In the third shell, an electron has more energy and is farther from the nucleus. c) In the third shell, an electron has less energy and is closer to the nucleus. d) In the third shell, an electron has less energy and is farther from the nucleus. 24. An atom of oxygen is in an excited state. When an electron in this atom moves from the third shell to the second shell, energy is a) emitted by the nucleus b) absorbed by the nucleus c) emitted by the electron d) absorbed by the electron 25. Which electron configuration could represent a strontium atom in an excited state? a) 2โ8โ18โ7โ1 b) 2โ8โ18โ8โ1 c) 2โ8โ18โ7โ3 d) 2โ8โ18โ8โ2
