The isotope is unstable. This is predictable because
A) the number of neutrons is too large in relation to the number of protons.
B) the number of neutrons is too small in relation to the number of protons.
C) the atomic number is too large.
D) the mass number is too large.
E) Sc isotopes are all unstable.

Question

The isotope  is unstable. This is predictable because
A) the number of neutrons is too large in relation to the number of protons. 
B) the number of neutrons is too small in relation to the number of protons. 
C) the atomic number is too large. 
D) the mass number is too large. 
E) Sc isotopes are all unstable.

Quizplus · Accepted Answer

The isotope is unstable because the number of neutrons is too small in relation to the number of protons. This means that the nucleus is not able to maintain its stability and may undergo radioactive decay.

The Isotope Is Unstable