Matter Flashcards
(9 cards)
smallest unit in an atom (protons, neutrons, and electrons.)
We can only change the numbers of electrons(-)
Element
2 or more of the same atom bonded by a chemical bond which stores chemical energy.
Molecule
2 or more atoms of different elements.
Compound
2 or more substances compounds, molecules and atoms
Mixture
Homogeneous
2 or more bonded atoms of the same element.
Heterogeneous
2 or more bonded atoms of the same element.
Pure
all the same atoms. Ex. Carbon.
Exothermic reaction
is when we take energy out and slow particles down going from gas to liquid to solid.
Endothermic reaction
is when we speed particles up and give energy and the state goes from solid to liquid to gas.