
Are there Undiscovered Elements Beyond The Periodic Table?
Interactive Video
•
Physics, Science, Chemistry
•
11th Grade - University
•
Practice Problem
•
Hard
Wayground Content
FREE Resource
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main reason for the gaps in the periodic table?
Lack of scientific interest
Unstable elements
Fictional elements
Incomplete atomic theory
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Who discovered the first artificial element, technetium?
Dmitri Mendeleev
Ernest Lawrence
Emilio Segre
Carlo Perrier
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is technetium not found naturally on Earth?
It is too rare
It is too light
It is too reactive
It is too unstable
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is an isotope?
A stable form of an element
A version of an element with a different number of neutrons
A fictional element
A different element with the same number of protons
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What force holds the nucleons together in an atomic nucleus?
Weak nuclear force
Gravitational force
Electromagnetic force
Strong nuclear force
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are magic numbers in nuclear physics?
Numbers that determine atomic weight
Numbers that complete nuclear shells
Numbers that indicate stable electron configurations
Numbers that predict chemical reactions
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of the island of stability?
It indicates a region of stable isotopes
It is a new chemical reaction
It represents a fictional concept
It is a new element discovered
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