Q: 22 (NDA-I/2016)
question_subject:
Science
question_exam:
NDA-I
stats:
0,43,11,10,43,1,0
keywords:
{'many neutrons': [0, 0, 0, 1], 'carbon': [1, 0, 4, 5], 'mass number': [0, 0, 0, 3], 'protons': [0, 0, 0, 1], 'atom': [0, 0, 0, 2]}
The correct answer is option 2: 6.
In this question, we are given that an atom of carbon has 6 protons. The mass number of an atom is the total number of protons and neutrons present in the nucleus. Since the mass number is given as 12, we can calculate the number of neutrons by subtracting the number of protons (6) from the mass number (12).
So the number of neutrons present in an atom of carbon can be calculated as follows:
Number of neutrons = Mass number - Number of protons
= 12 - 6
= 6
Hence, there are 6 neutrons present in an atom of carbon.