Question

Write the number of horizontal rows in the modern periodic table. What are these rows called?(Delhi - 2014)

Answer 1

Answer:

there are 7 horizontal rows. these rows are called periods.

Answer 2

The modern periodic table consists of 7 horizontal rows which are called periods.

Explanation:

• The periodic table is arranged with elements in periods and groups.
• The vertical column are called groups and there are 18 groups in the periodic table as shown in the attachment.
• The horizontal rows are called periods and there are 7 periods in the periodic tables as shown in the attachment.
• Each group has a specific name as follows:

Group 1 -Alkali metals

Group 2 - Alkali earth metals

Group 3 to 12 - Transition metals

Group 13 - Boron family

Group 14 - Carbon family

Group 15 - Pnictogens

Group 16 - Chalcogens

Group 17 - Halogens

Group 18 - Noble gases

Learn more about such concept

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