Matter and its Changes Flashcards

Terms Definitions
vaporization
semiconductors
metalloids are called semiconductors, have properties of both metals and nonmetals; somewhat malleable and ductile
Boiling
Vaporization that occurs throughout a liquid.
_________________ is a measure of whether an object floats or sinks in a gas or liquid.
Buoyancy
Formula
The formula tells you which elements make up a compound as well as how many atoms of each element are present
steam
Hot water vapor is often called _____.
When matter is in the __________ state, its particles can slip and slide past each other.
liquid
evaporation
This is vaporization that occurs at the surface of a liquid below its boiling point.
Gas
The state in which matter changes in both shape and volume.
water
_____expands when it gets colder. It does not do what most substance do. It expands at 39 degrees F.
When the particles of a mixture are evenly mixed and can't be seen, the mixture is a ______________.
solution.
compounds
a substance made of two or more elements chemically combines.
molecules are made of 2 or more atoms bonded together
true
When a car bursts into flames, what type of change is occuring?
Chemical Change
SOLID
A state of matter that has a definite volume and a definite shape.
states of matter
The physical forms in which a substance can exist.
Melting
The change of state from a solid to a liquid.
condensation
This is the change of state from a gas to a liquid.
what can density be used for
to identify what matter is. whatever that means?
What are the Actinides and where are they located on the periodic table?
Actinides are the most unstable of elements, they are very rare and found at the bottom of the table in the bottom row.
if you had 200 grams of oil and 200 grams of water, would you have more oil or water? why
oil because the particles are spread apart more than the water. therefore, it takes up more space.
nucleus
center of an atom
the formula for density
D=M/V
electron
negatively charged particle found spinning in the area around the nucleus called the electron cloud
Ionic Bonds
When electrons are exchanged
atom
the basic unit of matter
 
The smallest part of an element that still has all the characteristics of that element
mixture
differnt objects mixed together but each object which retains its properties.
Density
How highly packed a substance's molecules are; the mass of an object divided by its volume, in g/cm3
chemical
properties that can only be observed when matter interacts with other matter and forms something new
physical
properties that you can observe or measure without changing the composition of the matter
Isotopes
Atoms of an element with different atomic names but the same atomic number
mass#
equal to the protons and netrons making up its nucleus.
Molecule
The smallest particle of a compound that still keps all the properties of the compound.
sublimation
phase change from a solid directly to a gas
Matter
Anything that has mass and takes up space
neutron
particals in the nucleus of an atom which have a neutral charge.
Solution
A kind of mixture formed when one substance is dissolved in another.
negative
charge of an ion that is formed when an atom gains electrons
Plasma
The most common state of matter in the universe
Compound
A type of matter containing 2 or more chemically combined elements and having physical and chemical properties differerent from each of the elements in it.
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