Question 13: Given below are two statements:
Statement I : Atoms are electrically neutral as they contain equal number of positive and negative charges.
Statement II : Atoms of each element are stable and emit their characteristic spectrum.
In the light of the above statements, choose the most appropriate answer from the options given below :
(1) Both Statement I and Statement II are correct.
(2) Both Statement I and Statement II are incorrect.
(3) Statement I is correct but Statement II is incorrect.
(4) Statement I is incorrect but Statement II is correct.
Answer: Option (3)
Explanation:
Statement I is correct because an atom contains positively charged protons
and negatively charged electrons in equal numbers.
Due to the equality of positive and negative charges,
the net charge on an atom is zero, making it electrically neutral.
Statement II is incorrect because all atoms are not always stable.
Only excited atoms emit characteristic spectra when their electrons transition from higher energy levels to lower energy levels.
Stable atoms in the ground state do not emit radiation continuously.
Therefore, Statement I is correct but Statement II is incorrect.
Hence, the correct answer is option (3).