Chem Vocab Ch.4 Flashcards
Heterogeneous
A mixture with a composition that is different depending on what part of the samples you are observing
Homogenous
A mixture with a composition that is always the same no matter what part of the sample you are observing
Mixture
A substance that contains different compounds and/or elements
Homonuclear diatomics
Molecules made up of two atoms which are the same type
Kinetic Theory of Matter
Molecules and atoms are in contact motion, the higher the temperature, the greater their speed
Phase change
The physical change of a substance from one state to another
Chemical change
A change that effects the type of molecules or atoms in a substance
Physical change
A change in which the atoms or molecules in a substance stay the same
Melting Point
The temperature at which a substance changes from a solid to a liquid
Pure substance
A substance that contains only one element or compound
Boiling point
The temperature at which a substance changes from a liquid to a gas
Homonuclear diatoms
N2, O2, CL2, Br2, I2, At2, H2
