Nitrogen atom is represented at ¹⁴₇N. How many electrons does it need to attain the noble gas configuration? 

3

The correct answer is option (3) 3.

The nitrogen atom needs 3 electrons to attain the noble gas configuration.

Here's why:

Atomic number: The atomic number of nitrogen (N) is 7, which means it has 7 protons in its nucleus.

Electronic configuration: In its neutral state, a nitrogen atom has 7 electrons.

Noble gas configuration: The nearest noble gas to nitrogen is neon (Ne), which has a stable electronic configuration of 1s²2s².

Electrons needed: To achieve the same stable configuration, nitrogen needs to gain 3 electrons to fill its outer shell (2s orbital) to the maximum of 2 electrons.

Therefore, nitrogen needs 3 electrons to reach the stable noble gas electron configuration.