Phosphorus is a chemical element with symbol P and atomic number 15. As an element, phosphorus exists in two major formsâ white phosphorus and red phosphorus âbut due to its high reactivity, phosphorus is never found as a free element on Earth. Instead phosphorus-containing minerals are almost always present in their maximally oxidised state, as inorganic phosphate rocks.
Ages & Stages â Preschool Children. Three and four-year-old children are often called preschoolers. Preschool children want to touch, taste, smell, hear, and test things for themselves. They are eager to learn. They learn by experiencing and by doing. Preschoolers learn from their play.
The cost of sending your child to preschool. The term 'preschool' is often used to describe a form of childcare for three and four-year-olds before they start school. Find out more about choosing the right preschool here. Fees The average cost of childcare offering preschool education will be Â£5 -10 per hour. This will be reduced from the term after the child's third birthday for children.