What is the heat in joules required to convert 75.0 grams of water into steam if the ^hvap of water is 2257j/g?

Which element is the least metallic between cadmium, silver, zinc, or iron?

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)