University of Louisiana at Lafayette
Instructor - Jeremy Spring
Spring 2014 Semester
Life's Chemical Basis
Terms : Hide Images
| 1154216437 | atom | particle that is a fundamental building block of all matter | 1 | |
| 1154216438 | atomic number | number of protons in the atomic nucleus; determines the element | 2 | |
| 1154216439 | charge | electrical property; opposite charges attract, and the like charges repel | 3 | |
| 1154216440 | electron | negatively charged subatomic particle that consists only of atoms with the same number of protons | 4 | |
| 1154216441 | element | a pure substance that consists only of atoms with the same number of protons | 5 | |
| 1154216442 | isotopes | forms of an element that differ in the number of neutrons their atoms carry | 6 | |
| 1154216443 | mass number | total number of protons and neutrons in the nucleus of an element's atoms | 7 | |
| 1154216444 | neutron | uncharged subatomic particle in the atomic nucleus | 8 | |
| 1154216445 | nucleus | core of an atom; occupied by protons and neutrons | 9 | |
| 1154216446 | periodic table | tabular arrangement of the elements by atomic number | 10 | |
| 1154216447 | proton | positively charged subatomic particle that occurs in the nucleus of all atoms | 11 | |
| 1154216448 | radioactive decay | process by which atoms of a radioisotope emit energy and/or subatomic particles when their nucleus spontaneously disintegrates | 12 | |
| 1154216449 | radioisotope | isotope with an unstable nucleus | 13 | |
| 1154216450 | tracter | substance with a detectable component, such as a molecule labeled with a radioisotope | 14 | |
| 1154216451 | free radical | atom with an unpaired electron | 15 | |
| 1154216452 | ion | atom that carries a charge because it has an unequal number of protons and electrons | 16 | |
| 1154216453 | shell model | model of electron distribution in an atom | 17 | |
| 1154216454 | chemical bond | an attractive force that arises between two atoms when their electrons interact | 18 | |
| 1154216455 | compound | molecule that has atoms of more than one element | 19 | |
| 1154216456 | convalent bond | chemical bond in which two atoms share a pair of electrons | 20 | |
| 1154216457 | electronegativitiy | measure of the ability of an atom to pull electrons away from other atoms | 21 | |
| 1154216458 | ionic bond | chemical bond that consists of a strong mutual attraction between ions of opposite charge | 22 | |
| 1154216459 | molecule | group of two or more atoms joined by chemical bonds | 23 | |
| 1154216460 | polarity | separation of charge into positive and negative regions | 24 | |
| 1154216461 | cohesion | property of a substance that arises from the tendency of its molecules to resit separating from one another | 25 | |
| 1154216462 | evaporation | transition of a liquid to a gas | 26 | |
| 1154216463 | hydrogen bond | attraction between a covalently bonded hydrogen atom and another atom taking part in a separate covalent bond | 27 | |
| 1154216464 | hydrophilic | describes a substance that resists dissolving in water | 28 | |
| 1154216465 | hydrophobic | describes a substance that resists dissolving in water | 29 | |
| 1154216466 | mixture | an intermingling of two or more types of molecules | 30 | |
| 1154216467 | salt | ionic compound that releases ions other than H+ and OH- when it dissolves in water | 31 | |
| 1154216468 | solute | a dissolved substance | 32 | |
| 1154216469 | solution | homogeneous mixture | 33 | |
| 1154216470 | solvent | substance that can dissolve other substances | 34 | |
| 1154216471 | temperature | measure of molecular motion | 35 | |
| 1154216472 | acid | substance that releases hydrogen ions in water | 36 | |
| 1154216473 | base | substance that accepts hydrogen ions in water | 37 | |
| 1154216474 | buffer system | set of chemicals that can keep the pH of a solution stable by alternately donating and accepting ions that contribute to pH | 38 | |
| 1154216475 | concentration | the number of molecules or ions per unit of volume of a solution | 39 | |
| 1154216476 | pH | a measure of the number of hydrogen ions in a fluid | 40 |
