Play is an essential part of every childâs life and is vital to their development. Through play, children explore the world around them and develop and practise skills. Childrenâs play may or may not involve equipment or have an end product. Children play on their own and with others. Their play may be boisterous and energetic or quiet and contemplative, light-hearted or very serious. Childrenâs right to play. In 1991, the UK government ratified the United Nations convention on the rights of the child. The Playday campaign is committed to achieving the full implementation of this right, to ensure all children in the UK can play.
Characteristics: Tin is a silvery-white, soft, malleable metal that can be highly polished. Tin has a highly crystalline structure and when a tin bar is bent, a âtin cryâ is heard, due to the breaking of these crystals. In compounds tin is usually in the divalent state (Sn 2+) or tetravalent state (Sn 4+).It resists oxygen and water but dissolves in acids and bases. Exposed surfaces form an oxide film.in has a highly crystalline structure and when a tin bar is bent, a âtin cryâ is heard, due to the breaking of these crystals. In compounds tin is usually in the divalent state (Sn 2+) or tetravalent state (Sn 4+). It resists oxygen and water but dissolves in acids and bases.
Background. Tin is one of the basic chemical elements. When refined, it is a silvery-white metal known for its resistance to corrosion and its ability to coat other metals. It is most commonly used as a plating on the steel sheets used to form cans for food containers. Tin is also combined with copper to form bronze and with lead to form solder. A tin compound, stannous fluoride, is often added to toothpaste as a source of fluoride to prevent tooth decay. The earliest use of tin dates to about 3500. in what is now Turkey, where it was first mined and processed.