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Chapter 6
| Question | Answer |
|---|---|
| Acid | any substance that forms hydrogen ions (H+) in water and has a pH below 7 |
| Atom | smallest particle of an element that has the characteristics of that element |
| Base | any substance that forms hyrdoxide ions in water and has a pH above 7 |
| Compound | substance composed of atoms of two or more different elements that are chemically combined |
| Covalent bond | chemical bond formed when two atoms share electrons |
| Element | substance that can't be broken down into simpler chemical substances |
| Ion | atom or group of atoms that gain or lose electrons;has an electrical charge |
| Ionic Bond | chemical bond formed by the attractive forces between two ions of opposite charge |
| Isotope | atoms of the same element that have different numbers of neutrons in the nucleus |
| Metabolism | all of the chemical reactions that occur within an organism |
| Mixtutre | combination of substances in which individual components retain their own properties |
| Molecule | group of atoms held together by covalent bonds; has no overall charge |
| Nucleus | positively charged center of an atom composed of neutrons and positively charged protons ,and surrounded by negatively charged electrons |
| pH | measure of how acidic or basic a solution is; scale ranges from 0 to 14 |
| Solution | mixture in which one or more substances (solutes) are distributed evenly in another substance (solvent) |
| Diffusion | is the net movement of particles from an area of higher concentration to an area of lower concentration |
| Dynamic Equilibrium | result of diffusion where there is continuous movement of particles but no overall change in concentration |
| Hydrogen Bond | weak chemical bond formed by the attraction of positively charged hydrogen atoms to other negatively charged atoms |
| Polar Molecule | molecule with an unequal distribution of charge, resulting in the molecule having a positive end and a negative end |
| Amino Acid | basic building blocks of protein molecules |
| Carbohydrate | organic compound used by cells to store and release energy |
| Enyme | type of protein found in all living things that changes the rate of chemical reactions |
| Isomer | compounds with the same simple formula but different three-dimensional structures resulting in different physical and chemical properties |
| Lipid | are large biomolecules that are made mostly of carbon and hydrogen with a small amount of oxygen |
| Nucleic Acid | complex biomolecule that stores cellular information in the form of a code |
| Nucleiotide | subunits of nucleic acid formed from a simple sugar,a phosphate group and a nitrogenous base |
| Peptide Bond | covalent bond formed between amino acids |
| Polymer | large molecule formed when many smaller molecules bond together |
| Protein | a large complex polymer composed of carbon, hydrogen,oxygen,nitrogen and sometimes sulfur |
Created by:
alejos
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