Details

Title: Chapter 3

Description: Mrs.Dietrich test

Total Flash Cards: 19

Created: 11/08/2005 15:22:34

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Cards in this set:

Term
nucleus
 Definition
is the tiny central core of an atom.consists of protons and neutrons
Term
proton
 Definition
positive electric charge
Term
neutron
 Definition
neutral charge
Term
electron
 Definition
negative charge move rapidly around nucleus.
Term
atomic number
 Definition
the number of protons and electrons in its nucleus.
Term
atomic mass unit
 Definition
measures the particles in atoms.
Term
valence electrons
 Definition
involved in the formation of chemical bonds. either transfered or shared.
Term
electron dot diagram
 Definition
made up of symbol for an element surrounded by dots that represent the valence electrons.
Term
atomic mass
 Definition
average mass of one atom of the element.
Term
periodic table
 Definition
arrangement of the elements in orfer od atomic number.
Term
group/family
 Definition
elements in colomn's
Term
period
 Definition
horisontal row across the table
Term
malleable
 Definition
a material that can be pounded into shapes
Term
ductile
 Definition
meterial that can be pulled to wire
Term
conductor
 Definition
tranmit heat and electricity easily
Term
nonmetal
 Definition
do not have properties of metals.
Term
noble gas
 Definition
elements in group 18
Term
plasma
 Definition
state of matter when atoms are stripped of electrons, and the nuclei are acked closely.
Term
nuclear fusion
 Definition
smalle nuclei and larger nuclei , thus creating heavier elements