This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
In the family of boron and aluminum and the family of silicon and carbon, we can see that there are gaps. The gaps might be a hint that there are elements that are still unknown during the time of Mendeleev and Meyer....

16 4 16