1.1 The Particle Model Flashcards
3 states of matter
Solid, liquid, gas
Can substances exist in all states?
Most
Do individual atoms share the same properties as bulk matter?
No
Define physical change
It involves changes in the forces between the particles of the substance, but the particles themselves remain the same, as do the chemical properties of the substance
What change is melting?
Solid to liquid
What change is boiling?
Liquid to gas (below surface and surface)
What change is freezing?
Liquid to solid
What change is evaporation?
Liquid to gas (surface only)
What change is condensation?
Gas to a liquid
What change is sublimation?
Solid to a gas
Do molecules have the same physical and chemical properties as the atoms they contain?
No
Define atom
Smallest particle of an element. Atoms have a nucleus containing protons and (usually) neutrons, surrounded by electrons
Define chemical change
Change that produces new substances
Define chemical reaction
Process in which substances react to form different substances
Define electrostatic forces
Forces of attraction or repulsion between electrically charged particles
Define matter
Anything that has mass
Define model
Description, analogy, or equation that helps you explain the physical world
Define particle
Tiny piece of matter, such as an atom, ion or molecule
Define particle model
Scientific idea used to explain the properties of solids, liquids and gases
Define physical change
Change, such as changes in state, that does not result in new substances being made
Define state
The form that a substance has (solid, liquid or gas) under given conditions of temperature and pressure
How can you tell when a gas is produced in a reaction?
Creates a smell/ colour/ bubbles/ mass is lost/ sounds
