properties of semi metals/metalloids

The deliberate addition of a desirable impurity atom to a pure semiconductor to modify its properties in a controlled manner is doping. The impurity atoms added are called dopants. It is worth to note that the electrical conductivity of semiconductors can be increased to a great extent. A..

The excess pressure that must be applied to the solution/conc.solution to prevent osmosis. fig 3.11 - Principle of measuring osmotic pressure fig 3.12 If two solutions of identical composition but different concentration are separated by a semi permeable membr..

Introduction - All elements in the periodic table have been classified as metals and non-metals. The non-metals are placed on the right hand side of the periodic table. Non-metals are simple small molecules that are mostly gases. Elements between metalsh..

Elements - "An element is a pure substance which is made up of only one kind of atoms having the same atomic number." "The smallest particle of an element is the atom which, has all the properties of that element." "An element cannot be broken down into simpler su..

Summary Matter is anything that occupies space and has mass Element is a pure substance, which can neither be decomposed nor built from simpler substances by any physical or chemical means. It contains only one kind of atom. Broadly speaking, elements can be divided into metals..

In the chapter on current electricity, we had learnt about the flow of charges, conditions to produce the flow and how different materials respond to an external electric field. We had seen how materials are classified as conductors and insulators. In this chapter, we will study a new type of mater..

. Hence, no conductivity is show..

Meiosis Random chromosome segregation Fertilization DNA sequence Role of chromosomes in determining an individual's sex Possible combinations of alleles in a zygote from the genetic makeup of the parents Probable outcome of phenotypes in a genetic cross from the genotypes of the parent..

Meiosis Random chromosome segregation Fertilization DNA sequence Role of chromosomes in determining an individual's sex Possible combinations of alleles in a zygote from the genetic makeup of the parents Probable outcome of phenotypes in a genetic cross from the genotypes of the parent..