1. Trend across a given period: increasing (with a few exceptions).
QUESTION:
Which of the following has the highest ionization energy in the period where it belongs? A. Ne, B. Na, C. Br, D. Mn
Ionization energy is a measure of how difficult it is to remove an electron from an atom.
Trend across a given period: increasing (with a few exceptions).
Period = horizontal row in the periodic table
The right-most group: noble gases
SCRIPT:
Which of the following has the highest ionization energy in the period where it belongs? Neon… sodium…. Bromine…. Manganese
PAUSE
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Ionization energy refers to the energy needed to remove an electron from an atom. The higher the ionization energy, the more difficult it is to remove an electron from an atom.
CLICK The observed 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.
CLICK Since the trend increases from the left to right, the rightmost element would have the highest ionization energy. That would be the noble gas.
Of the choices given here, only neon is a noble gas.
You will find Neon in column 18
in period 2.
Among the elements in period 2, neon atoms have the highest ionization energy.
END RECORDING

3. 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