Question

An element x has an atomic number 34 give position in periodic table

Answer 1

In periodic table the atomic no of 34 position is selenium

Answer 2

Answer: The element X will be in period-4 and group number 16 that is oxygen family group.

Explanation:

$[X]_{34}=1s^22s^22p^63s^23p^64s^23d^{10}4p^4$

From the electronic configuration of an element X , last electron is entering p-orbital which means that element belongs to p-block in periodic table.

Also last electron is entering in principle quantum shell number 4 which means it will lie in the forth period in a periodic table.

Group in a periodic table tells us about the number of valence electrons in metals. In element X there are 6 valence electrons.

Valence electron = group number - 10 (for p-block elements)

6 = group number  - 10

Group number = 16

So, the element X will be in period-4 and group number 16 that is oxygen family group.