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Unformatted text preview: 90 (add atomic number to number of neutrons) (1 pt) 7. Write a symbol for the isotope of a nitrogen atom with 8 neutrons. 7 N 15 (1pt) 8. What is the electron arrangement of potassium? 2,8,8,1 (1pt) 9. Describe the trend in ionization energy and atomic size across a period and across a group. Across a period ionization energy increases and down a group ionization energy decreases Across a period Atomic radius decreases and down a group Atomic radius increases (1 pt) 10. Classify each of the following as a pure substance or a mixture. a) sugar pure b) coffee with milk and sugar mixture...
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This test prep was uploaded on 04/10/2008 for the course CHEM 231 taught by Professor Hanover during the Spring '08 term at Lansing.
- Spring '08