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Oksana_A [137]
3 years ago
15

Why is it called the periodic table of elements (why is the word periodic in it)

Chemistry
1 answer:
olchik [2.2K]3 years ago
8 0

Answer:

It is called "periodic" because elements are lined up in cycles or periods. From left to right elements are lined up in rows based on their atomic number (the number of protons in their nucleus). ... Each horizontal row in the table is a period. There are seven (or eight) total periods.

Explanation:

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