User:IsaacRodgers

matters and their properties

Examples of what I am talking about focusing on Matter. It is everythingaround you which is made up of atom and molecules. Matter is anything that hasmass and takes up space. Allthe material on earth is in three states-solid, liquid, and gas. A block of wood, milk and air all haveproperties. The "state" of the matter refers to the group of matterwith the same properties. In other words, you group the objects togetheraccording to their properties.Nowlet’s have little information about solids, the wood block is solid. A solidhas a certain size and shape. The wood block does not change size or shape; infact you can change the shape of solids. You change the shape of sheets oflumber by sawing it in half or burning it. . Other examples of solids are thecomputer, the desk, and the floor.Movingon to liquids, like Milk as it is liquid matter. It has a size or volume.Volume means it takes up space. But milk doesn't have a definite shape. Ittakes the shape of its container. Liquids can flow, be poured and spilled,other example of liquids are water, cool drink, sulphuric acid, etc.Finally,what can we say about gases, mph let’s see. Most gases are invisible eg oxygen anda gas is matter that has no shape or size of its own. Gases have no colour.Gases are all around you. You can feel gas when the wind blows. The wind ismoving air. Air is many gases mixed together.

What happens when atoms bond?

A chemical bond is formed when atoms are held together by attractive forces. This attraction occurs when electrons are shared between atoms, or when electrons are exchanged between the atoms that are involved in the bond. The sharing or exchange of electrons takes place so that the outer energy levels of the atoms involved are filled, making the atoms are more stable. If an electron is shared, it means that it will spend its time moving in the electron orbitals around both atoms. If an electron is exchanged it means that it is transferred from one atom to another. In other words one atom gains an electron while the other loses an electron.

Definition 1: Chemical bond A chemical bond is the physical process that causes atoms and molecules to be attracted to each other and held together in more stable chemical compounds. The type of bond that is formed depends on the elements that are involved. In this chapter, we will be looking at three types of chemical bonding: covalent, ionic and metallic bonding.

You need to remember that it is the valence electrons (those in the outermost level) that are involved in bonding and that atoms will try to fill their outer energy levels so that they are more stable. The noble gases have completely full outer energy levels, so are very stable and do not react easily with other atoms.

http://everythingscience.co.za/grade-10/06-chemical-bonding/06-chemical-bonding-01.cnxmlplus