Trends in ionization energy:

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Presentation transcript:

Trends in ionization energy: QUESTION: Which of the following has the highest ionization energy? A. Na, B. Rb, C. N Trends in ionization energy: Across a given period: increasing (with a few exceptions). Going up a group: increasing SCRIPT: Which of the following has the highest ionization energy? sodium,…. Rubidium…, or nitrogen PAUSE CLICK The observed general trend in ionization energy is that it increases as you from go from left-to-right across any given period. A period refers to a horizontal row in the periodic table. The trend is also increasing going up a group. A group refers to a vertical column in the periodic table. So… let’s locate these elements in the periodic table Sodium and rubidium are both in column one, or group one A. Sodium is in period 3, while rubidium is in period 5. CLICK Nitrogen is in period 2, column 15, or group 5A. The trend is increasing going up a group… CLICK So sodium has a higher ionization energy than rubidium. And Lithium has a higher ionization energy than sodium CLLICK Now, across a period from left to right, the trend is also increasing. Therefore, nitrogen has a higher ionization energy than lithium. Of the choices given END RECORDING

increasing increasing

Trends in ionization energy: QUESTION: Which of the following has the highest ionization energy? A. Na, B. Rb, C. N Trends in ionization energy: Across a given period: increasing (with a few exceptions). Going up a group: increasing SCRIPT: Which of the following has the highest ionization energy? sodium,…. Rubidium…, or nitrogen PAUSE CLICK The observed general trend in ionization energy is that it increases as you from go from left-to-right across any given period. A period refers to a horizontal row in the periodic table. The trend is also increasing going up a group. A group refers to a vertical column in the periodic table. So… let’s locate these elements in the periodic table Sodium and rubidium are both in column one, or group one A. Sodium is in period 3, while rubidium is in period 5. CLICK Nitrogen is in period 2, column 15, or group 5A. The trend is increasing going up a group… CLICK So sodium has a higher ionization energy than rubidium. And Lithium has a higher ionization energy than sodium CLLICK Now, across a period from left to right, the trend is also increasing. Therefore, nitrogen has a higher ionization energy than lithium. Of the choices given, nitrogen has the highest ionization energy. END RECORDING

Video ID: 2-6-2 © 2008, Project VALUE (Video Assessment Library for Undergraduate Education), Department of Physical Sciences Nicholls State University Author: Glenn V. Lo Narrator: Funded by Louisiana Board of Regents Contract No. LA-DL-SELECT-13-07/08