Periodic Table and Counting atoms

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•
Science
•
8th Grade
•
Hard
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19 questions
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1.
FLASHCARD QUESTION
Front
A ___________ is an arrangement of elements in columns.
Back
periodic table
2.
FLASHCARD QUESTION
Front
In the modern periodic table, elements are arranged by: atomic mass, atomic number, valence electrons, number of isotopes
Back
atomic number
3.
FLASHCARD QUESTION
Front
Each row in the periodic table is called a
Back
period
4.
FLASHCARD QUESTION
Front
Elements with properties that fall between those of metals and nonmetals
Back
metalloids
5.
FLASHCARD QUESTION
Front
Element with 2 valence electrons and 3 energy levels. Options: 1, 2, 3, 4
Back
1
6.
FLASHCARD QUESTION
Front
Which pair of properties describe the elements in group 18?
Back
They are gases at room temperature and are stable.
7.
FLASHCARD QUESTION
Front
Which two elements on the periodic table are in the same group? Options: Na and He, O and C, Li and Ne, He and Ar
Back
He and Ar
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