Chemical Basis of Life :: essays research papers

Chapter 4The chemical substance Basis of lookIntroductionYour body is an elaborate chemical system.Chemical signals between brain little enable your mind to understand what you see.You nourish those cells with chemicals that be obtained from food.Life is each(prenominal) about chemicals and how they moveConcept 4.1Life requires about 25 chemical elementsElementsHumans and other organisms are examples of matter.Matter Anything that occupies space and has mass. (Physical things)The miscellaneous forms of matter are composed of one or more chemical elements.Element A pure contentedness that cannot be broken down into smaller substances by chemical meansThere are 25 elements are essential to life. Four of these elements are Oxygen (O), Carbon (C), Hydrogen (H), and Nitrogen (N). These work up up about 96% of the living matter in your body. Calcium (CA), Phosphorus (P), Potassium (K), sulfur (S), and a few other elements account for just about of the remaining 4%.Trace Elemen ts elements that make up less that 0.01 percent of your body mass are nevertheless critical to your health.CompoundsMost elements can interact with other elements forming complex types of matter called compounds.Compound A substance containing two or more elements that are chemically combined in a unconquerable ratio.Compounds properties may differ greatly from those of its components.Though simple compounds identical sodium chloride and water play important roles in living things, most compounds found in organisms are more complex, containing at least three or four elements.Concept 4.2Chemical properties are based on the structure of atoms.Different elements bring variant properties. Some are solid metal at room temperature, some are invisible gases, some elements readily react with other elements, whiles others just react at all. These properties affect the roles that different elements play in biological processes. This section describes how an elements properties to its stru cture.AtomsEach element consists of a single kind of atom that is different from the atoms of all other elements.Atom- gets its name from the Greek word atomos, meaning indivisible is the smallest possible Pierceit would take more than tree million carbon atoms to orbit across the period printed at the end of this sentence.Atoms are all elements are made up of even smaller components called subatomic subdivisions. Proton Is a subatomic particle with a single unit of positive electrical charge.electron is a subatomic particle with a unit of negative charge.Neutron is electrically neutral.Nucleus is the halfway of an atom. It is made up of tightly packed protons and neutrons.Electrons, which have more less mass than neutrons and protons continually, move about the outside of the nucleus at great speed.Chemical Basis of Life essays research papers Chapter 4The Chemical Basis of LifeIntroductionYour body is an elaborate chemical system.Chemical signals between brain less enable your mind to understand what you see.You nourish those cells with chemicals that are obtained from food.Life is all about chemicals and how they interactConcept 4.1Life requires about 25 chemical elementsElementsHumans and other organisms are examples of matter.Matter Anything that occupies space and has mass. (Physical things)The various forms of matter are composed of one or more chemical elements.Element A pure substance that cannot be broken down into smaller substances by chemical meansThere are 25 elements are essential to life. Four of these elements are Oxygen (O), Carbon (C), Hydrogen (H), and Nitrogen (N). These make up about 96% of the living matter in your body. Calcium (CA), Phosphorus (P), Potassium (K), sulfur (S), and a few other elements account for most of the remaining 4%.Trace Elements elements that make up less that 0.01 percent of your body mass are nevertheless critical to your health.CompoundsMost elements can interact with other elements forming complex type s of matter called compounds.Compound A substance containing two or more elements that are chemically combined in a fixed ratio.Compounds properties may differ greatly from those of its components.Though simple compounds like sodium chloride and water play important roles in living things, most compounds found in organisms are more complex, containing at least three or four elements.Concept 4.2Chemical properties are based on the structure of atoms.Different elements have different properties. Some are solid metal at room temperature, some are invisible gases, some elements readily react with other elements, whiles others hardly react at all. These properties affect the roles that different elements play in biological processes. This section describes how an elements properties to its structure.AtomsEach element consists of a single kind of atom that is different from the atoms of all other elements.Atom- gets its name from the Greek word atomos, meaning indivisible is the smallest possible Pierceit would take more than tree million carbon atoms to stretch across the period printed at the end of this sentence.Atoms are all elements are made up of even smaller components called subatomic particles. Proton Is a subatomic particle with a single unit of positive electrical charge.Electron is a subatomic particle with a unit of negative charge.Neutron is electrically neutral.Nucleus is the center of an atom. It is made up of tightly packed protons and neutrons.Electrons, which have much less mass than neutrons and protons continually, move about the outside of the nucleus at great speed.