Chemistry Unit Test Review Flashcards
melting point
the temperature at which a substance melts
quantitative property
boiling point
the temperature at which a substance boils
quantitative property
physical property
describes the general appearance of a substance
chemical property
describes how a substance may behave when it comes in contact with other substances
examples of qualitative properties
- texture
- brittleness
- clarity
- malleability
- ductility
examples of quantitative properties
- melting point
- boiling point
- mass
- density
- volume
examples of chemical properties
- corrosion
- flammability
- reactive with water
- reaction with acid
- light sensitivity
indicators of chemical change
- a new colour
- heat is produced
- reaction cools down (heat is removed)
- light is produced
- a gas is produces (bubbles) with no heat
- a precipitate is produced (a solid forms in a liquid and does no dissolve)
what units are used to express density?
g/cm³
g/mL
kg/m³
kg/L
what type of property is density?
physical quantitative property
What was the first subatomic particle discovered?
The electron discovered by Joseph John Thompson
Raisin Bun model
Joseph John Thompson
(1904)
Electrons surrounded by a cloud of protons
Saturnian model
Nagaoka
(1904)
Positive sphere with a ring of electrons
what is the atomic theory?
4 points
- All matter is made of atoms too small to see
- Each element has its own kind of atom with its own particular size and shape
- Atoms cannot be created or destroyed
- Compounds are created when atoms of different elements link together in definite proportions
Proton
Mass: mass of 1
Electric charge: +1
Location: in the nucleus
