Who is generally responsible for how the periodic table is formatted?
Dmitri Mendeleev
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15
What are the vertical columns in the periodic table called?
Groups
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What does the atomic number of an element refer to?
The number of protons in a single atom of that element
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15
Which color represents metalloids?
Yellow
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Which grouping of elements share similar characteristics? Periods or Groups?
Groups aka vertical columns
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What are valence electrons?
The electrons in an atom's outermost shell
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Which color represents metals?
Blue
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Would you consider an element with 1 valence electron highly reactive or not reactive? Why?
Highly reactive because it can easily lose the one electron to become stable
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How is the periodic table ordered?
By increasing atomic number
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What name is given to the family of elements furthest to the right on the table: elements with a full valence shell that do not react with other elements to form molecules?
Noble gases
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How many valence electrons do Alkaline Earth Metals have?
2
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How many electrons does there need to be in a valence shell for an atom to be stable?
