PS Ch 5 & 6 words and definitions

Name:

Period:

Chapter 5 and 6 Vocabulary


Term


Picture/Symbol/Word


Definition



Atom



The basic particle from which all elements are made; the smallest particle of an element that has the properties of that element


Electron



A negatively charged particle that moves around

the nucleus of an atom


Nucleus



The central core of an atom


Proton



Positively charged particles that are found in the

nucleus of an atom


Energy level



A region of an atom in which electrons of the

same energy are likely found


Neutron



A small particle in the nucleus of an atom with

no electrical charge


Atomic number



The number of protons in the nucleus of an atom


Isotope



An atom w/the same # of protons and a

different # of neutrons from other atoms of the

same element


Mass number



The sum of protons and neutrons in the nucleus

of an atom


Atomic mass



The average mass of all of the isotopes of an

element


Periodic table



An arrangement of the elements showing the

repeating patterns of their properties


Chemical symbol


A 1 or 2 letter representation of an element


Period



A horizontal row of elements in the periodic

table


Group/chemical families


Elements in the same vertical column of the

periodic table


Metal



A class of elements characterized by physical

properties that include shininess, mallebility,  and

conductivity


Nonmetal



An element that lacks most of the properties of

a metal


Metalloid



An element that has some characteristics of

both metals and nonmetals


Ionic bond



The attraction between oppositely charged ions


Ions



An atom or group of atoms that has become

electrically charged


Chemical formula


Symbols that show the elements in a compound

and the ratio of atoms


Covalent bonds



A chemical bond formed when 2 atoms share

electrons


Chemical reactions


A process that involves rearrangement of the

molecular or ionic structure of a substance


Physical

change


A change that alters the form or appearance of a material but does not make the material into another substance