[tÃ¤râ²sÉs] pl. tarsi. Etymology: Gk, tarsos, flat surface. 1 the flat area of articulation between the foot and the leg or the edge of the eyelid. 2 also called tarsal cartilage, tarsal plate. Any one of the fibrous plates of cartilage about 2.5 cm long that form the eyelids. One tarsal plate shapes and gives solidarity to the edge of each eyelid.
Hydrogen is reduced by elements that are less electronegative to form compounds in which its oxidation number is -1. Properties and Formation of Hydrogen. At room temperature, hydrogen is a colorless, odorless gas with a density only one-fourteenth the density of air. Small quantities of H 2 gas can be prepared in several ways. 1.
The molar mass of hydrogen gas (H2) is 2.0158g. Hydrogen gas is diatomic therefore it's formula is H2. The atomic mass of hydrogen is 1.0079g and multiplying by the two hydrog â¦ en atoms is equal to 2.0158g.