What's the Matter?
anything that has mass and takes up space
Matter
Phase change where a liquid becomes a solid
Freezing
Properties that can only be observed when one substance changes into a different substance.
Chemical Property
Consists of only one kind of atom
Element
Oil and water do no mix. Oil floats on water because it is less _____________.
Dense
Particles are tightly packed, vibrating about a fixed position
Solid
Phase change where a solid becomes a liquid
Melting
Any change that transforms one substance into a different substance
Chemical Change
The building blocks of matter. Made of protons, neutrons, and electrons
Atom
Calculate the density of a metal that displaces 30 mL of water and weighs 60 g.
d = m / V
d = 60 g / 30 mL
d = 2 g/mL
Particles are very far apart and move freely
Gas
Phase change where a gas becomes a liquid
Condensation
Properties that you can measure or see through direct observation.
Physical Property
A mixture in which the parts of a mixture are very different from one another.
Heterogeneous
The tension of the surface film of a liquid caused by the attraction of the particles in the surface layer is
Surface Tension
Have definite shape and definite volume
Solids
Phase change where a liquid becomes a gas
Vaporization (boiling)
Changes in the physical properties of matter. Can be reversed without changing one substance into another.
Physical Change
Two or more atoms of the same element. Br2, I2, N2, Cl2, H2, O2, F2
Molecule
Hand sanitizer soap burning is an example of which kind of change? Chemical Change or Physical Change?
Chemical Change
Has Indefinite Shape and Indefinite Volume
Gas or Plasma
Phase change where a solid becomes a gas
Sublimation
Release of Gas (bubbling); Formation of a precipitate (liquid turns cloudy); Release or absorption of energy (temperature change); Color change
Evidence of a Chemical Change or Chemical Reaction
Atoms of two or more different elements bound together. HCl, H2O, CO2
Compound
Crumpled up paper on the floor is an example of what kind of change? Chemical Change or Physical Change?
Physical Change