Matter and its Properties Essay

The key building blocks of number ar atoms and molecules. These make up elements and compounds. An atom is the smallest building block of an element that maintains the properties of that element. And element is a pure fondness made of hardly one kind of atom. A compound is the substance that is made from the atoms of cardinal or to a greater extent elements that argon chemical substancely bonded. Water is an fount of a compound because it is one of many compounds that consist of molecules. The hydrogen and oxygen molecules ar chemically bonded to form a water molecule.Properties and Changes in Matter every(prenominal) substance, whether an element or compound, has characteristic properties. Chemists use these properties to distinguish different substances and wherefore use their knowledge of characteristics to separate them.A keeping may be a characteristic that defines an entire group of substances. That property can be used to classify an unknown substance within that gr oup. For example, argon heroic groups of elements is metals. The property that sets than apart from anything else is that they hold electricity well. Therefore, if scientists find an unknown element, and adjudicate it for electricity conduction, and it turns out to conduct electricity well, it is, in fact, a metal.Properties besides define subgroups or substances. And can also help to reveal the individuality of an unknown substance. However, identification usually cannot be made based on only one property. Comparisons of several properties can be used to see the indistinguishability of an unknown. Properties are either intensive or extensive. An extensive property depends on the amount of matter that is present. These properties allow in sight, mass, and the amount of energy in a said substance. Intensive properties, however, do not depend on the amount of matter present. These properties include the melting point, boil point, density, and ability to conduct electricit y and heat. Regardless of how much of a substance is present, these properties will everlastingly be the same. chemical and Physical Properties and ChangesPhysical Properties and Physical ChangesA physiological property is a characteristic that can be measured or observed without changing the identity of the substance. Physical properties describe the substance itself. Examples of these properties are properties such as melting point and boiling point.A wobble in a substance that does not involve a flip-flop in the identity of the substance is called a physical kind. Examples of physical changes include grinding, gutting, melting, and boiling a substance or material. These changes do not change the physical identity of a property. For example If you rip a study in half, does that change the identity of the two torn parts? The resolving is no, it is still a base, just smaller and ripped. If you bend a paper clip, is it still a paper clip? Yes.Melting point and boiling point a re part of an important classification of physical changes called change of state. A change of state is a physical change of a substance from on state to another. The three common states of matter are solid, liquid, and gas. Matter in the solid shape has a explicit volume and definite shape. Matter in the liquid state has a definite value, but not a definite shape-a liquid can be molded or form into many different shapes. Matter in the gas state has neither definite volume nor definite shape.Chemical Properties and Chemical ChangesPhysical properties can be observed without changing the identity of the substance, but chemical properties cannot. A chemical property relates to a substances ability to undergo changes that transform it into different substances. Chemical properties are easiest to see when substances react to form (a) new substance(s). For example, when charcoal burns, it combines with oxygen in air to become a new substance, carbon paper dioxide gas. After this ch emical change, the original substances of the charcoal, carbon and oxygen, are no longer present. Another example is the ability of iron to rust by combining with oxygen in the air (moisture).A change in which one or more substances are converted into different substances is called a chemical change or reaction. The substances that react in a chemical change are called the reactants. The substances formed by the chemical change are called the products. By burning charcoal, carbon and oxygen are the reactants in a combustion, or burning reaction. speed of light dioxide is the product.Chemical changes and reactions, such as combustion and decomposition, form products whose properties differ greatly from those of the reactants. Chemical changes, however, do not affect the total amount of matter present before and after a reaction. The amount of matter, and total mass, last out the same.