1.To which period and group does an elemer

2 answers:

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Period 3 and group IA
Because the periods are the vertical columns and the groups are the horizontal ones. The element with the atomic number 11 is sodium.

amm18124 years ago

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Answer:

The element discussed here belongs to the period 1A.So,the element A,which has its atomic number as 11 belongs to group 1(1A) on the periodic Table.

Explanation:

Group and periods are two ways of categorizing element in the periodic table.Periods are horizontal rows (across) the periodic table,while groups are vertical columns (down) the table.Atomic number increases as you move down a group of across the periods.

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