Question

An element X belongs to 1e group and 3rd period of the modern periodic table. Now
answer the following questions.
i) What is the valency of that element ?
ii) Write the number of shells present in the atom of that element.
iil) Write the name of that element.
iv) State whether it is a metal or a non-metal.
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Answer 1

Answer:

Since element  'X' belongs to group 1st and period 3rd in the modern periodic table. The name of element 'X' is Sodium [ Na ] . Electronic configuration of Na as 2 , 8 , 1 or [ Ne ] 3 s¹

a. Valency of 'X' is 1 as it denote 1 electron to become stable.

b. There are 3 numbers of shell present in the atom of 'X' i.e. K , L and M.

c. Sodium is the name of that element.

d. It is metal as it denotes its electron.