2nd Group

  • Default: Be, Mg, Ca, Sr, Ba, Ra respectively.

  • Molecules:

    • Neutral atoms: 2 bonds are accepted.

    • Charged atoms: Each added charge decreases by one the number of possible bonds.

    • Radical: Each added radical decreases by one the number of possible bonds

  • Ions:

    • Be2+, Mg2+, Ca2+, Sr2+, Ba2+ Ra2+ are accepted

  • Radicals: ·Me+ is accepted