What is the atomic number used for?
Atomic Number and Periodic Table:
The Periodic Table of Elements is a systematic arrangement of all known chemical elements. The Periodic Table identifies key facts about each individual element including: atomic number, symbol, electron configuration, chemical properties, and trends.
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fromChapter 7 / Lesson 1
Learn the definition of representative elements. Learn about their groups, their blocks, which are metals and nonmetals. See them on the periodic table.