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Nuclear Chemistry and Radioactivity — Chemistry STD 11 Science — Question

Maharashtra BoardEnglish MediumSTD 11 ScienceChemistryNuclear Chemistry and Radioactivity3 Marks
Question
Define:
i. Isotopes
ii. Isobars
✓

Answer

i. Isotopes: Nuclides which contain same number of protons but different number of neutrons in their nuclei are called as isotopes. e.g. ${ }_{11}^{22} Na ,{ }_{11}^{23} Na$ and ${ }_{11}^{24} Na$
ii. Isobars: Nuclides (of different element) which have same mass number but have different number of protons and neutrons in their nuclei are called as isobars.
$OR$
The atoms of different elements having the same mass number but different atomic numbers are called isobars.
e.g. ${ }_6^{14} C$ and ${ }_7^{14} N$

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