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