Question

# Which of the following are not stable?(i) $$_{6}^{14}{C}$$(ii) $$_{6}^{13}{C}$$(iii) $$_{7}^{14}{N}$$(iv) $$_{11}^{24}{Na}$$

A
(i) 146C, (ii) 136C, (iv) 2411Na
B
(i) 146C, (ii) 136C, (iii) 147N
C
(i) 146C, (iii) 147N, (iv) 2411Na
D
None of these

Solution

## The correct option is A (i) $$_{6}^{14}{C}$$, (ii) $$_{6}^{13}{C}$$, (iv) $$_{11}^{24}{Na}$$An unstable isotope undergoes radioactive decay meaning it looses energy over time while emitting radiation.Carbon-14 atoms have two extra neutrons, giving them a total of 8 neutrons. Carbon-14 has an atomic mass of 14 ( = 6 protons + 8 neutrons). The extra neutrons make the nucleus of carbon-14 unstable.C-13 is relatively stable than C-12 but not as stable as C-12.Also Na-24 is unstable and undergoes radioactive decay giving Mg.ChemistryNCERTStandard XII

Suggest Corrections

0

Similar questions
View More

Same exercise questions
View More

People also searched for
View More