This is the number of electrons needed to fulfill elements in the oxygen group.
This many equivalents of a Grignard reagent are needed to fully reduce an ester. The main reaction in the Daniell cell transfers this many electrons, and in almost all listings of the quantum numbers, this is the position of the azimuthal number, which is also symbolized l. The (*) bond order is the difference in bonding and antibonding electrons divided by this number. This is the number of oxygen atoms in the nitrite ion, and it's the negative charge in ions like sulfate and carbonate. This is the number of electrons needed to fulfill elements in the oxygen group. For 10 points, give this atomic number of helium.
This many equivalents of a Grignard reagent are needed to fully reduce an ester.
two (accept negative two after “negative” is first read; accept second or 2nd after “almost all listings” is read)