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1A, 3B, and 7A are examples of group on the periodic table.

User MayurK
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Answer:

Groups

Step-by-step explanation:

User Shane Creedon
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Answer : Names.

Explanation : 1A, 3B and 7A are the examples of group Names on the periodic table.

The names of the groups are given in the form of numbers and alphabets. Which represents the vertical columns of the elements present in the modern periodic table.

Each group represents a somewhat similar chemical property for the elements present in it.

User Dentex
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