Which of the following solids (C{s, diainond), Kr(s), NaCl(s) or H2O(s)) has the highest melting point and why?

Astudent is asked to identify and element that is pale yellow brittle solid and does not conduct electricity. at which location in this periodic table would the element most likely be found?

What is the percent by mass of oxygen in fe2o3

What are the major types of a chemical compound