Name: Formula: Other name(s) Aluminum: Al +3: Ammonium: NH 4 + Barium: Ba +2: Calcium: Ca +2: Chromium(II) Cr +2: Chromous: Chromium(III) Cr +3: Chromic: Copper(I) Cu + Cuprous: Copper(II) Cu +2: Cupric: Iron(II) Fe +2: Ferrous: Iron(III) Fe +3: Ferric: Hydrogen: H + Hydronium: H 3 O + Lead(II) Pb +2: Lithium: Li + Magnesium: Mg +2: Manganese(II) Mn +2: Manganous: Manganese(III) Mn +3: Manganic: Mercury(I) Hg 2 +2: Mercurous: Mercury(II) Hg +2
1 Make a fine paste line near your top knuckle, and let that dry. 2  Apply thick henna paste up to that line. 3  As the paste dries and bare spots open up, fill those in with more henna. 4  Leave that on for one hour or more. 5  For darker color and more even stain, scrape the paste back and reapply henna a second time.he stain may be dark as the picture at the top of the page or a deep red color, depending on your skin and the henna you use. Other techniques from history: 1  Mix the henna very thick, like pie dough, and press the thick paste onto your fingertips and fingernails.
and The Drawbacks of Mehndi (before you begin) Mehndi usually lasts for at least one to two weeks. I have heard of people saying that mehndi can last from two to four weeks; however, this figure is misleading because the length mehndi will stay depends on a number of factors. Henna works by staining the outer layers of the epidermis, permanently.