Explain why a sewing needle can float on the surface of water in a glass

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

In the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false

Use the periodic table to find the molar mass of each element. molar mass h = g/mol molar mass s = g/mol molar mass o = g/mol