Science unit test Flashcards
Matter can be broken down into?
Pure substances
Pure substances can be broken down into?
Elements and compounds
Elements and compounds are composed of?
Atoms
Atoms can be broken down into?
Protons, neutrons, and electrons
Liquid to gas?
Evaporation
gas to liquid?
Condonsation
solid to gas
sublimation
gas to solid
Deposition
solid to liquid
melting
liquid to solid
Freezing
what is matter?
Anything that takes up space
What is a physical change?
A reversible change that only changes somethings physical form.
The three subatomic particles in an atom?
protons, neutrons and electrons
what is the atomic number?
the amount of protons and electrons in an atom
Three states of mater?
Solid, liquid, gas
four main statements of the kinetic molecular theory?
- always moving
- have a small volume
- have intermolecular forces
- experience elastic colitions
where is each particle located in the atom?
Electrons = orbitals Protons = nucleus Neutrons = nucleus
what is a compound?
something composed of two or more separate elements
what’s the difference between a physical change and a chemical change?
A physical change is reversible
A chemical change isn’t
How is the periodic table organized?
Atomic weight and electrons
