Confidence votes 20.5K. All the halogens (periodic column 17) oxygen, and sulfur. Silver can also form alloys with many other metals, but these are not usually considered chemical reactions because they do not always produce compounds with constant composition. All the halogens (periodic column 17) oxygen, and sulfur.
The mucosa covering the upper surface of the tongue is thrown into numerous projections called the lingual papillae in the anterior 2/3rd of the tongue. In the posterior 1/3rd, there are no papillae, but there are lots of lymphoid follicles present. The three types of papillae are: fungiform (mushroom like)
1 On the surface of the tongue there are tiny papillae, they are in large number and the main function of the papilla is they act as taste buds. 2  Tongue can distinguish the taste of the food, such as bitter, sour, sweet and salty.