Question
Which of the following are isotopes?
Answer: Option A
:
A and C
∙ Isotopes have the same atomic number (same number of protons) and different mass number.
∙ Since, 11H, 21H, 31H have the same atomic number, they are isotopes of hydrogen.
∙ Similarly, 126C, 136C, 146C have same atomic number, hence they are isotopes of carbon.
∙ Whereas, 4020Ca, 4018Ar and 5826Fe, 5827Ni have different atomic numbers and hence, are not isotopes. They are isobars as they have same mass number.
Was this answer helpful ?
:
A and C
∙ Isotopes have the same atomic number (same number of protons) and different mass number.
∙ Since, 11H, 21H, 31H have the same atomic number, they are isotopes of hydrogen.
∙ Similarly, 126C, 136C, 146C have same atomic number, hence they are isotopes of carbon.
∙ Whereas, 4020Ca, 4018Ar and 5826Fe, 5827Ni have different atomic numbers and hence, are not isotopes. They are isobars as they have same mass number.
Was this answer helpful ?
More Questions on This Topic :
Latest Videos
Latest Test Papers
Submit Solution