book k chp 3 vocab
Order by
20 terms
Terms | Definitions |
|---|---|
 nucleus | the central core of an atom containing protons and usually neutrons |
| proton | a small positively charged particle in the nucleus of the atom |
| neutron | a small particle in the nucleus of the atom with no electrical charge |
| electron | a tiny negatively charged particle that moves around the nucleus of an atom |
| atomic number | the number of protons in the nucleus of an atom |
| isotope | an atom with same number of protons and a different number of neutrons from other atoms |
| mass number | the sum of protons and neutrons in the nucleus of an atom |
| model | object that helps explain ideas about the natural world |
| atomic mass | the average mass of all the isotopes of an element |
| periodic table | a chart of the elements showing the repeating pattern of their properties |
| chemical symbol | a one or two letter representation of an element |
| period | a horizontal row of elements in the periodic table |
| group | elements in the same vertical column of the periodic table also called a family |
| metal | a class of elements characterized by physical properties that include shininess, malleability, ductility,and conductivity |
| malleable | a term used to describe material that can be pounded into shapes |
| ductile | a term used to describe a material that can be pulled out into a long wire |
| conductivity | the ability of an object to transfer heat or electricity to another object |
| reactivity | the ease and speed with an element combines, or reacts, with other elements and compounds |
| corrosion | the gradual wearing away of a metal element due to a chemical reaction |
| alkali metal | an element in group 1 of the periodic table |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.