Science · Flashcard Deck
Periodic Table Essentials
The periodic table, one card at a time: the first 36 elements plus the famous heavyweights — symbols, names and what each element is known for — with the core concepts that make the table make sense.
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- Atomic number = the number of {{c1::protons}} in an atom's nucleus.
- Elements in the same {{c1::group}} (vertical column) share similar chemical properties.
- A horizontal row of the periodic table is called a {{c1::period}}.
- Most elements are {{c1::metals}}; the nonmetals cluster in the table's upper right.
- H
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Atomic number = the number of ____ in an atom's nucleus.
Answerprotons
Elements in the same ____ (vertical column) share similar chemical properties.
Answergroup
A horizontal row of the periodic table is called a ____.
Answerperiod
Most elements are ____; the nonmetals cluster in the table's upper right.
Answermetals
H
AnswerHydrogen — #1. The lightest element and the most abundant in the universe.
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