Explain the following variations in atomic or ionic radii: Fe>Fe2 >Fe3 1. The 4s valence electrons in Fe are on average from the nucleus than the 3d electrons, so Fe is larger than Fe2 . 2. Because there are five 3d orbitals, in Fe2 at least must contain a pair of electrons. 3. Removing one electron to form Fe3 significantly repulsion, increasing the nuclear charge experienced by each of the other d electrons and decreasing the size of the ion.

Which step in naming unsaturated hydrocarbons is used for alkenes but not alkynes

Both josef loschmidt and amedeo avogadro contributed to our understanding of basic molecular numbers, sizes, and reaction ratios. neither scientist discovered “avogadro’s number” in the form we use it today (6.02 x 10 23). still, there’s a controversy over the name. research the contributions from these two scientists and read about how avogadro’s number got its name. briefly state what you think this number should be called, providing key details of each scientist’s contributions to this concept and a solid rationale for your case in naming the number.

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true