Calculate the radius of the He nucleus.

need help with: a,b&c

Suppose you are producing nanoparticles in a vacuum chamber with a pressure of 150 Pa.  What is the size of the critical nucleus at 1473 K for (a) copper and (b) gold?

What is the activity (in particles/s) of a sample of Carbon-14 that contains 9.070E+21 nuclei?

An unknown element X has the following isotopes: ⁶⁴X (49.00% abundant), ⁶⁶X (28.00% abundant), ⁶⁸X (23.00% abundant). What is the average atomic mass in amu of X?

Write the appropriate symbol (with A, Z and the element symbol) for an yttrium isotope that has 39 protons and 50 neutrons in its nucleus.

(a) Suppose 6/ 3 Li is struck by an alpha particle, releasing a proton and a product nucleus in the reaction. What is the product nucleus? (b) An alpha particle and a product nucleus are produced when 9 / 4 Be is struck by a proton. What is the product nucleus?

ts) We can approximate the 232Th nucleus as a one-dimensional infinite square well with length L equal to the nuclear radius R = R₁A¹/3, where Ro = 1.2 fm and A is the atomic mass number. (a) What is the length of this infinite square well? What is the ground state energy of a proton (which has mass m₂ = 938.3 MeV/c²) in this infinite square well? (b) 232Th has 90 protons and 142 neutrons. Assume that all these protons and neutrons trapped in the infinite square well. How many energy levels of this infinite square well contain protons? How many energy levels contain neutrons?