This compound is named potassium chloride. Example 5: Write the name of the following formula: Na2S. First symbol is Na, so the first part of the name is sodium. (Note the presence of the subscript does not play a role in this name.) Second element is sulfur (from the symbol S), so the name is sulf + ide = sulfide. This compound is named sodium sulfide.
The viviparous sharks who carry the eggs until the pups are born, have different gestation periods. The dogfish shark is known to keep their eggs for 18 to 24 months. The bull shark gestation is about one year. The hammerhead shark gestation period is from 7 to 12 months. Other species that are ovoviviparous carry the eggs until the pups born alive and fully developed. They also have long gestation periods. The tiger shark gestation is about 14 to 16 months.
gestation period see gestation period. incubation period see incubation period. isoelectric period the moment in muscular contraction when no deflection of the galvanometer is produced. latency period. 1. latent period.2. latency stage. latent period a seemingly inactive period, as that between exposure to an infection and the onset of illness (incubation period) or that between the instant of stimulation and the beginning of response (latency, def. 2).estation period see gestation period. incubation period see incubation period. isoelectric period the moment in muscular contraction when no deflection of the galvanometer is produced. latency period. 1. latent period.