You will know the overall abundances of the elements. You will know how we measure abundances (especially of the lightest elements). You will be able to determine which abundances are primordial. You ...You will know the overall abundances of the elements. You will know how we measure abundances (especially of the lightest elements). You will be able to determine which abundances are primordial. You will be able to explain how the neutron to proton ratio = 1/7 causes basic proportions of ¾ H and ¼ He. You will understand the effect of baryon-to-photon ratio on the abundances of the light elements. You will know that the measured abundances of the light elements can all be explained by ig Bang N
