1. QUESTION:
Which of the following elements is a post-transition metal? A. silicon, B. lead, C. sodium, D. chromium
SCRIPT:
Which of the following elements is a transition metal? A. silicon, B. lead, C. sodium, D. chromium
PAUSE
The best way to answer this question is to refer to the periodic table.
CONTINUED ON NEXT SLIDE

2. The transition elements, or transition metals are in the highlighted section of the periodic table shown here.
The post-transition metals are the metals belonging to groups 3A,
CLICK
4A,
and 5A
that immediately follow the transition metals.
The six naturally occurring post-transition metals are gallium, indium, thallium, tin, lead, and bismuth.
Here’s silicon…
its symbol is Si
Here’s lead…
CLICK its symbol is Pb
Here’s sodium
CLICK its symbol is Na
And here’s chromium…
its symbol is Cr
The correct answer is lead.
CLICK HIGHLIGHT answer
PAUSE
END RECORDING

3. QUESTION:
Which of the following elements is a transition metal? A. silicon, B. lead, C. sodium, D. chromium

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