Answer is: false.
<span>According to the principle of base pairing hydrogen bonds could form between adenine and thymine (two hydrogen bonds between this nucleobases) and guanine and cytosine (three hydrogen bonds between this nucleobases).
Adenine and guanine are </span>purine derivatives and thymine and cytosine are pyrimidine<span> derivates.</span>
I only knew a few of these:
1. Curium
2. Copper
8. Iron
11. Barium
13. Zinc
14. Europium
29. Au (gold)
