Secondary Catalogue
Chemistry
Naming Covalent Substances
This lesson will discuss the rules for writing the names and chemical formulae of covalent molecules and covalent networks.
The Physical Properties of Elements
The pirates are off to find more treasure! Will they make it across the stormy seas? This lesson will survey the physical properties of metals, non-metals and metalloids.
Naming Binary Ionic Compounds
This lesson will reveal the rules for writing the names and chemical formulae of ionic compounds, by balancing charges and using the cross method.
Naming Hydrated Salts
This lesson will explain the differences between hydrated and anhydrous salts, including how to write their names and chemical formulae.
Naming Polyatomic Ions
This lesson will uncover the rules for writing the names and chemical formulae of polyatomic ions and ionic compounds.
Naming Monoatomic Ions
This lesson will introduce the rules for writing the names and chemical formulae of non-metal anions and metal cations, including metals with multiple positive oxidation states.
The Periodic Table
Long Jane Silver buys an antique table, despite an old sailor's warning that it is haunted! Is she ready to discover what lies waiting inside? This lesson will introduce the periodic table of elements and explain how it is organised.
The Modern Periodic Table
Periodic Classification of Elements
The elements in the Periodic Table are roughly divided into metals, metalloids and non - metals. There are seven periods in the Periodic Table. The vertical columns in a Periodic Table are called groups and there are 18 groups in the Periodic Table.
Rusting and Its Prevention
Rusting damages things made of iron, making the structures weak. Rusting can be prevented by the use of some methods.
Solids
Solid is that state of matter which retains a fixed shape and volume. The particles in solids are closely packed and hence the interparticle forces are the strongest in it. Solids cannot be compressed and posses rigidity.
Characteristics of Groups: Valence Electrons and Valency
Periodic Classification of Elements
The groups in the Periodic Table are arranged vertically. There are 18 groups in the Periodic Table. All the elements in one group have the same electronic configuration and hence the same number of valence electrons and the same valency.
Combination Reaction
A combination reaction is a reaction, in which two or more elements or compounds combine together to form a single compound. For example, magnesium burns completely on heating, leaving behind a powdery white ash of magnesium oxide.
Physical Properties of Metals
Metals are generally solid, hard and strong, have a metallic lustre and high melting and boiling points. Metals are also malleable, ductile, and good conductors of heat and electricity.
