Question

characteristics of period and group

Answer 1

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A period is a horizontal row of the periodic table. There are seven periodsin the periodic table, with each one beginning at the far left. A new periodbegins when a new principal energy level begins filling with electrons.

The periodic table also has a special name for its vertical columns. Each column is called a group. The elements in each group have the same number of electrons in the outer orbital.

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Answer 2

The horizontal rows from left to right in the periodic table are called periods
There are seven periods in all.



Vertical columns in the periodic table starting fromtop to bottom are called groups or families.
The group are denoted by IA to VIIA, IB to VIIB.
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