Literacy in Ghana. OVERVIEW. Literacy attainment in Ghana is varied across regions, from the more literate, urban south. of the country to the less-literate, rural north. The national average for literacy in Ghana is 58%; more than 4 out of every 10 Ghanaians. cannot read in any language.
Tin is a chemical element with symbol Sn (from Latin: stannum) and atomic number 50. It is a post-transition metal in group 14 of the periodic table. It is obtained chiefly from the mineral cassiterite, which contains tin dioxide, SnO2. Tin shows a chemical similarity to both of its neighbors in group 14, germanium and lead, and has two main oxidation states, +2 and the slightly more stable +4. Tin is the 49th most abundant element and has, with 10 stable isotopes, the largest number of stable isotopes in the periodic table, thanks to its magic number of protons.
A compound semiconductor is a semiconductor compound composed of elements from two or more different groups of the periodic table.