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Carbon - The Periodic Table part 9

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Elemental symbol: C Atomic number: 6 Group: Nonmetals or metalloids (rarely) Stable Isotopes: 12 C (common carbon), 13 C Some Radioactive Isotopes: 8 C, 9 C, 10 C, 11 C, 14 C, 15 C, 16 C, 17 C, 18 C, 19 C, 20 C, 21 C, 22 C Some Allotropes: Graphite, diamond, carbon nanotube, amorphous carbon, lonsdaleite, fullerene, graphene Subliming point: 4098K, 3825°C, or 6917°F State at room temperature (20°C/68°F): Solid Density: 3.513 g/cm 3 (diamond), 2.2 g/cm 3 (graphite) Common compounds: Carbon dioxide (CO 2 ), methane (CH 4 ), benzene (C 6 H 6 ), carbon monoxide (CO), and many more... Discovered by: Discovered in prehistoric times Carbon is the most important building block to life. Oxygen (O) along with other elements help out too, but carbon creates DNA, proteins, steroids and more. DNA is especially important to life. If your DNA instantly disappeared, you would probably feel fine for a little while. The problem is that you’re not fine. This is referred to as the
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Boron - The Periodic Table part 8

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Elemental symbol: B Atomic number: 5 Group: Metalloid Stable Isotopes: 11 B (common boron), 10 B Some Radioactive Isotopes: 6 B, 7 B, 8 B, 9 B, 12 B, 13 B, 14 B, 15 B, 16 B, 17 B, 18 B, 19 B, 20 B, 21 B Some Allotropes: Alpha tetragonal boron, alpha rhombohedral boron, beta rhombohedral boron Melting point: 2350K, 2077°C, or 3771°F Boiling point: 4273K, 4000°C, or 7232°F State at room temperature (20°C/68°F): Solid Density: 2.37 g/cm 3 Common compounds: sodium borate/borax (Na 2 [B 4 O 5 (OH) 4 ]⋅8H 2 0), boric acid (H 3 BO 3 ), boron nitride (BN), boron carbide (B 4 C) and many more...  Discovered by:  Louis-Josef Gay-Lussac and Louis-Jacques Thénard independently from Humphry Davy in 1808 Boron in a hard but brittle gray metal. For the reason that it’s brittle, boron is used mostly in compounds. Boron nitride (BN) makes crystals similar to crystals that carbon (C) can create. Cubic boron nitride is very hard, and under certain definitions of ‘hard’, it could b
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