Copy of Unruly Elements 2 (Periodic Table and Radioactivity) - Video Questions (5/28/2026)
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Last updated about 2 hours ago
22 questions
Note from the author:
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.
Question 1
02:06
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Question 2
03:28
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Question 3
05:27
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Question 4
07:28
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Question 5
11:27
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Question 6
13:33
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Question 7
15:10
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Question 8
19:00
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Question 9
20:46
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Question 10
21:33
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Question 11
22:36
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Question 12
24:50
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Question 13
35:30
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Question 14
39:38
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Question 15
40:15
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Question 16
41:19
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Question 17
42:56
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Question 18
43:32
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Question 19
44:45
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Question 20
49:32
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Question 21
53:01
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Question 22
53:43
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Question 1
1.
Using the _______ test, it was discovered that different substances gave off different _______ when they were burned.
Question 2
2.
The new instrument that created bar codes from burning elements in a Bunsen burner was called the _______ .
Question 3
3.
Dimitry Mendeleev is credited with creating the _______
Question 4
4.
One of the ways to distinguish one element from another is by using their _______ .
Question 5
5.
While trying to write his textbook, Mendeleev needed to find a(n) _______ around which to _______
the known elements.
Question 6
6.
Mendeleev began organizing elements according to increasing atomic weight. However, he kept elements with similar _______ in the same row.
Question 7
7.
Similar to playing his favorite card game, Mendeleev used two things to begin building a chart to organize the elements. They were _______ and _______ .
Question 8
8.
What organizing principle did Mendeleev eventually consider more important than increasing atomic weights (think of the debate between Iodine and Tellurium)? _______
Question 9
9.
Elements in the _______ of the periodic table will have similar properties.
Question 10
10.
Mendeleev was able to use the pattern of his periodic table to predict the properties of _______
Question 11
11.
Mendeleev challenged a French chemist regarding his density calculations, and he was proved to be accurate. What was that element? _______
Question 12
12.
The family of _______ was added to the periodic table because they all had similar properties; one of those properties was that they were all _______ meaning that they would not chemically react.
Question 13
13.
An interesting property of uranic rays was its ability to _______ the air so that electricity could pass through the air.
Question 14
14.
Besides uranium, _______ was also able to give off rays that would help air to conduct electricity.
Question 15
15.
The term that Curie gave to this property of uranium and thorium was _______ .
Question 16
16.
Due to the radioactivity of pitchblende, Curie suspected that it contained another _______ within it.
Question 17
17.
Because Curie was finding that the pitchblende ore contained radioactivity from different sources, she suspected that it contained _______ radioactive elements.
Question 18
18.
The first radioactive element that Curie discovered was _______ .
Question 19
19.
The second element that Curie discovered was _______ .
Question 20
20.
What award did the scientific community attempt to prevent Marie Curie from receiving at that time? _______
Question 21
21.
The energy of radiation was discovered to be from the _______ of the atoms.
Question 22
22.
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 _______