WOW!! CHEMISTRY TEE STUDY GUIDE

WOW!! CHEMISTRY TEE STUDY GUIDE - CHEMISTRY TEE STUDY GUIDE...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
CHEMISTRY TEE STUDY GUIDE Created by CDT Brian Hatalla, Class of 2004 Block 1 - BASIC TOOLS OF CHEMISTRY Definitions : absolute zero ~ The lowest possible temperature, equivalent to -273.15 o C, used as the zero point of the Kelvin scale. accuracy ~ The agreement between the measured quantity and the accepted value. atom ~ The smallest particle of an element that retains the chemical properties of that element. atomic mass ~ The average mass of an atom in a natural sample of the element. atomic number ~ (Z) The number of protons in the nucleus of an atom of an element. chemical change ~ A change that involves the transformation of one or more substances into one or more different substances. chemical equation ~ A written representation of a chemical reaction, showing the reactants and products, their physical states, and the direction in which the reaction proceeds. electron ~ A negatively charged subatomic particle found in the space about the nucleus. element ~ Matter that is composed of only one kind of atom. gas ~ The phase of matter in which a substance has no definite shape and a volume is defined only by the size of its container. heterogeneous mixture ~ A mixture in which the properties in one region or sample are different from those in another region or sample. homogeneous mixture ~ A mixture in which the properties are the same throughout, regardless of the optical resolution used to examine it. isotopes ~ atoms whose nuclei have same atomic number (Z) but different mass number (A), because of a difference in the number of neutrons. kinetic molecular theory ~ A theory of the behavior of matter at the molecular level Law of Conservation of Matter ~ A law which states that matter is neither created nor destroyed in an ordinary chemical reaction. Law of Constant Composition ~ A pure compound, whatever its source, always contains definite or constant proportions of the same elements by mass. liquid ~ The phase of matter in which a substance has no definite shape but a definite volume. mass number ~ The sum of the number of protons and neutrons in the nucleus of an atom of an element. molecule ~ The smallest unit of a compound that retains the properties of that compound. neutron ~ An electrically neutral subatomic particle found in the nucleus. nucleus ~ The core of an atom, containing protons and neutrons. physical change ~ A change that involves only physical properties. physical properties ~ Properties of a substance that can be measured and observed without changing the composition of the substance. precision ~ The agreement of repeated measurements of a quantity with one another. products
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 24

WOW!! CHEMISTRY TEE STUDY GUIDE - CHEMISTRY TEE STUDY GUIDE...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online