Elf
building blocks of matter
what are atoms?
no charge
what kind of charge do neutrons have?
the amount of mass per unit volume
what is density?
they have a negative charge and move quickly around the nucleus of an atom
what are electrons?
a mixture where individual substances are not evenly mixed
what is a heterogeneous mixture?
what is mass?
protons and neutrons
what is the nucleus of an atom made up of?
a type of substance that contains only one type of atom
what is an element?
it tells you the number of protons there is in an atom
what does an atomic number tell you?
a mixture where substances are evenly mixed
what is a homogeneous mixture?
the temperature at which a liquid changes to a gas
what is boiling point?
the temperature at which a solid changes to a liquid
what is melting point?
the ability of one substance to dissolve in another
what is solubility?
When a gas changes into a liquid
what is condensation?
another name for a homogenous mixture
what is a solution?
mass and volume
what are two physical properties that are size-dependent?
when a solid changes directly into a gas
what is sublimation?
the amount of substance in a certain volume
what is concentration?
when a gas changes directly into a solid
what is deposition?
a process where atoms rearrange and bond into new substances
what is a reaction? (chemical reaction)
-Chopping wood with an axe
-Dissolving salt in water
-Crumpling a sheet of paper into a ball
what are examples of physical changes?
-iron nail rusting
-baking a cake
-apple changing color and developing an odor
what are examples of a chemical change?
the matter's identity stays the same
what happens in a physical change?
the substance/solid that is added to the base to be dissolved in
what is a solute?
the substance in largest amount (base) in which solids and other substances are added into
what is a solvent?