requirements of everyday life or the arts, either in a free state or in their compounds:—
| Lithium, | Li | = | 7. | In medicine (Li 2 CO 3 ), and in photography (LiBr). | |
|---|---|---|---|---|---|
| Boron, | B | = | 11. | As borax, B 4 Na 2 O 7 , and as boric anhydride, B 2 O 3 . | |
| Fluorine, | F | = | 19. | As fluor spar, CaF 2 , and as hydrofluoric acid, HF. | |
| Chromium, | Cr | = | 52. | As chromic anhydride, CrO 3 , and potassium dichromate, K 2 Cr 2 O 7 . | |
| Manganese, | Mn | = | 55. | As manganese peroxide, MnO 2 , and potassium permanganate, MnKO 4 . | |
| Cobalt, | Co | = | 59·5. | In smalt and blue glass. | |
| Nickel, | Ni | = | 59·5. | For electro-plating other metals. | |
| Copper, | Cu | = | 63. | The well-known red metal. | |
| Zinc, | Zn | = | 65. | Used for the plates of batteries, roofing, &c. | |
| Arsenic, | As | = | 75. | White arsenic (poison), As 2 O 3 . | |
| Bromine, | Cu | = | 80. | A brown volatile liquid; sodium bromide, NaBr. | |
| Strontium, | Sr | = | 87. | In coloured fires (SrN 2 O 6 ). | |
| Silver, | Ag | = | 109. | The well-known white metal. | |
| Cadmium, | Cd | = | 112. | In alloys. Yellow paint (CdS). | |
| Tin, | Sn | = | 119. | The well-known metal. | |
| Antimony, | Sb | = | 120. | In alloys such as type metal. | |
| Iodine, | I | = | 127. | In medicine and photography; free, and as KI. | |
| Barium, | Ba | = | 137. | “Permanent white,” and as an adulterant in white lead, and in heavy spar, BaSO 4 . | |
| Platinum, | Pt | = | 196. | Well-known metals. | |
| Gold, | Au | = | 197. | ||
| Mercury, | Hg | = | 200. | ||
| Lead, | Pb | = | 207. | ||
| Bismuth, | Bi | = | 209. | In medicine and fusible alloys. | |
| Uranium, | U | = | 239. | In green fluorescent glass. |