The particle model Flashcards
(17 cards)
Particles are
either single atoms or molecules
The particle model states:
All matter is made of particles, a force of attraction tends to hold particles together, particles have energy and are always moving or vibrating and adding heat to particles makes them move faster, gain energy and break the bonds holding them together.
What is the strength of attraction between particles in a solid?
Strong attractive forces hold the particles in a fixed position so that they cannot move, only vibrate.
What is the strength of attraction between particles in a liquid?
Medium strength forces hold them near each other but let them flow.
What is the strength of attraction between particles in a gas?
low attraction allowing them to move freely bouncing off the walls of their container and other particles.
How do you give particles more energy?
By heating them.
Particles with the least energy belong in:
Solids.
Particles with the most energy belong in:
gases.
examples of particles with single atoms:
Elements like helium or oxygen
examples of particles which are molecules:
Compounds like water.
Particles with the most movement belong in:
gases
Particles with the least movement belong in:
solids.
Movement increases with:
The increase of heat and energy.
Fill in the blank: In liquids, particles are _______ together but can move past one another.
close
Which state of matter has a definite shape and volume?
Solid
What happens to the particles in a gas when the temperature increases?
The particles move faster and spread further apart.
True or False: The particle model can explain changes in state, such as melting and boiling.
True
