fourth paper Flashcards
(38 cards)
classify matter into 4 states
1) solid
2) liquid
3) gas
4) plasma
what do chemical elements represent?
the simplest and purest forms of everyday matter
each element is composed of ___
atoms
the atom is not ____
indivisible
every atom has a dense core called a ____
nucleus
how many particles is the nucleus composed of? and what are they?
2
protons and neutrons
the nucleus is surrounded by particles called _____
electrons
what charge do protons, neutrons, and electons have?
protons = positive
neutrons = no charge
electrons = negative
every atom associated with a particular element has a fixed number of _____
protons
the number of protons distinguishes the ______
element
the atomic number of an element specifies the number of _______
protons
chemical compounds are made from building blocks called _____
molecules
every molecule of a particular compound consists of the same unique combination of _______
2 or more atoms
the attractive force between solid particles is ______
strong
the atoms or molecules in a solid are ______ bound to there neighbors and can only ______
rigidly
vibrate
liquid particles are bound together but not _______
rigidly
each atom or molecule in a liquid move about relative to each other but are always in _____ with other ____ or ______
contact
atoms
molecules
attractive forces of gases are to _____ to _____ ______
weak
bind together
atoms and molecules in gases move ______
freely
atoms or molecules in a solid arranged geometric pattern are called ______
crystals
atoms or molecules that arent arranged in a pattern are called ______
amorphus solids
in ______, the interatomic forces are insufficient to bind the atoms rigidly
liquids
in ______, the interatomic forces are negligible unless the atoms are very close
gases
high speed _____ atoms have a large impact force on a container.
gas
