Which one(s) below right about valence electrons? a they are all electrons of an atom b the number of valence electrons in the atoms of an element determines that element`s chemical properties c they are at the outermost shell of the atom. d valence electrons have the highest energy e valence electrons have the lowest energy.

How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123

Each of the following reactions is allowed to come to equilibrium and then the volume is changed as indicated. predict the effect (shift right, shift left, or no effect) of the indicated volume change. drag the appropriate items to their respective bins. co(g) + h2o(g) < => co2(g) + h2(g) (volume is decreased) pcl3(g) + cl2(g) < => pcl5(g) (volume is increased) caco3(s)< => cao(s) + co2(g) (volume is increased)

What is the compound name for the formula [ru(en)2cl2]2+ and [co(en)cl2br]-