1. 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

2. increasing
increasing

3. 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

4. Video ID: © 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