- Joe Biden (allthetropes.org)
Joseph Robinette Biden Jr. (born November 20, 1942) is the 46th president of the United States of America. He is one of only eight people who served as Vice President before serving as President (in his case, he served under Barack Obama), and only the second person (after Richard Nixon) to have served as a Senator and as Vice President before becoming President. He’s also the oldest person to have been elected President of the United States of America.
- Boron (Wikipedia)
Boron is a chemical element; it has symbol B and atomic number 5. In its crystalline form it is a brittle, dark, lustrous metalloid; in its amorphous form it is a brown powder. As the lightest element of the boron group it has three valence electrons for forming covalent bonds, resulting in many compounds such as boric acid, the mineral sodium borate, and the ultra-hard crystals of boron carbide and boron nitride.