(b) (i) Carbon-12 is a stable isotope. Carbon-14 is an unstable radioactive isotope. Table 12.2 shows the contents of each nucleus.
Carbon-12
Carbon-14
Number of protons
6
6
Number of neutrons
6
8
Table 12.2
Explain why carbon-12 and carbon-14 are isotopes.
[1]

An object in mechanical equilibrium is an object

Will mark brainliest! asap! ! 16) which of the clouds shown would indicate a possible future rain storm? a) b) c) d)

An alpha particle with kinetic energy 12.5 mev makes a collision with lead nucleus, but it is not "aimed" at the center of the lead nucleus, and has an initial nonzero angular momentum (with respect to the stationary lead nucleus) of magnitude l = p0 b, where p0 is the magnitude of the initial momentum of the alpha particle and b=1.40×10−12 m. (assume that the lead nucleus remains stationary and that it may be treated as a point charge. the atomic number of lead is 82. the alpha particle is a helium nucleus, with atomic number 2.) what is the distance of closest approach?