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Groups or families; all are arranged by the number of valence electrons.

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What is horizontal on the periodic table of elements are called periods?

each row in the Periodic Table is called a period.


What are the different rows of elements in the periodic table called?

The rows of elements in the periodic table are called periods. There are a total of 7 periods in the periodic table, each representing a different energy level or shell in which the elements' electrons are arranged.


What are the rows called in the periodic table?

Rows in the Periodic Table are called Periods.There are 7 periods in total.All the elements in period have same number of energy levels.


What is referred to as periods regarding the Periodic Table of the Elements?

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What do we call the horizontal row in the periodic table of elements?

Horizontal rows are called periods. There are 7 periods in periodic table.


What are horizontal rows of elements in the periodic table?

Horizontal rows of elements in the periodic table are called periods. Each period represents a different energy level, with elements in the same period having the same number of electron shells. Periods are arranged in numerical order from left to right on the periodic table.


A row of elements across the periodic table is an?

A row of elements across the periodic table is called a period. Periods represent the number of electron shells in an atom.


What r the rows called on the periodic table?

Horizontal rows on the Periodic Table of Chemical Elements are called periods.


What is the name of the table of elements?

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What are the horizon rows in the periodic table called?

The horizontal rows on the periodic table are called periods.


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The rows on the periodic table are called periods.