<span>Mendeleev found that there were gaps in his periodic table. In addition, by working out the chemical properties of the elements he did have recorded, he was able to notice that there were likely elements that fit the descriptions between those elements.</span>
Answer: Their son chose this group because he shares their interests.
Though the answer isn't too obvious, it makes sense.
Hope this helped :)
Ren(concern for others) and Li(appropriate behavior)
This weapon brought significant changes to warfare during the Hundred Years' War:
A. longbow
Why did the Flemish support Edward III's claim to the throne of France:
C. Their textile industry depended on English wool.