Periodic Table
Flashcard
•
Chemistry
•
8th Grade
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the Periodic Table?
Back
A tabular arrangement of chemical elements, organized by increasing atomic number, electron configuration, and recurring chemical properties.
2.
FLASHCARD QUESTION
Front
What does each row in the Periodic Table represent?
Back
Each row (period) represents the number of electron shells in the atoms of the elements.
3.
FLASHCARD QUESTION
Front
What does each column in the Periodic Table represent?
Back
Each column (group) contains elements that have similar chemical properties and the same number of valence electrons.
4.
FLASHCARD QUESTION
Front
What is atomic mass?
Back
The weighted average mass of an element's isotopes, measured in atomic mass units (amu).
5.
FLASHCARD QUESTION
Front
Who is credited with the discovery of the electron?
Back
J.J. Thomson is credited with the discovery of the electron in 1897.
6.
FLASHCARD QUESTION
Front
What are valence electrons?
Back
Electrons in the outermost shell of an atom that determine its chemical properties and reactivity.
7.
FLASHCARD QUESTION
Front
How many valence electrons does an element in Group 1 have?
Back
Elements in Group 1 have 1 valence electron.
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