Question

Define perodic table what are period and groups​

Answer 1

period is a horizontal row of the periodic table. There are seven periods in the periodic table, with each one beginning at the far left.

Step-by-step explanation:

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Answer 2

In model periodic table the atoms are arranged wrt atomic number, there chemical behaviour, and properties.

The horizontal rows of periodic table are known as periods.

The vertical line of periodic table are knows as groups.