Copy of Unruly Elements 2 (Periodic Table and Radioactivity) - Video Questions (5/28/2026)
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This video will go over the major experiments and discoveries that have led to the development of the periodic table of elements and radioactivity.
Read a few questions ahead, watch the video, and listen for the answers to each question.
If you didn't hear the answer to the question, rewind the cursor a bit and play the section again.
You only need to answer half of the questions, correctly, for full credit.
This video will go over the major experiments and discoveries that have led to the development of the periodic table of elements and radioactivity.
Read a few questions ahead, watch the video, and listen for the answers to each question.
If you didn't hear the answer to the question, rewind the cursor a bit and play the section again.
You only need to answer half of the questions, correctly, for full credit.
Using the
The new instrument that created bar codes from burning elements in a Bunsen burner was called the
Dimitry Mendeleev is credited with creating the
One of the ways to distinguish one element from another is by using their
While trying to write his textbook, Mendeleev needed to find a(n)
Mendeleev began organizing elements according to increasing atomic weight. However, he kept elements with similar
Similar to playing his favorite card game, Mendeleev used two things to begin building a chart to organize the elements. They were
What organizing principle did Mendeleev eventually consider more important than increasing atomic weights (think of the debate between Iodine and Tellurium)?
Elements in the
Mendeleev was able to use the pattern of his periodic table to predict the properties of
Mendeleev challenged a French chemist regarding his density calculations, and he was proved to be accurate. What was that element?
The family of
An interesting property of uranic rays was its ability to
Besides uranium,
The term that Curie gave to this property of uranium and thorium was
Due to the radioactivity of pitchblende, Curie suspected that it contained another
Because Curie was finding that the pitchblende ore contained radioactivity from different sources, she suspected that it contained
The first radioactive element that Curie discovered was
The second element that Curie discovered was
What award did the scientific community attempt to prevent Marie Curie from receiving at that time?
The energy of radiation was discovered to be from the
The discovery of the nature of radiation led to the realization that the atom cannot be a solid object on its own; instead, they must be made up of smaller