Density of Materials Flashcards
Particle Model of Matter (11 cards)
What is the formula for density?
Density (kg/m³) = mass (kg) / volume (m³)
Density is defined as a substance’s mass per unit volume.
What does the density of an object depend on?
The material composition and the arrangement of its particles
A dense material has its particles packed tightly together.
What happens to the density of a material when it is compressed?
It becomes more dense due to decreased volume while mass remains the same
The particles move closer together when compressed.
List the three states of matter.
- Solid
- Liquid
- Gas
The particles of a substance remain the same in each state; only their arrangement and energy differ.
Describe the arrangement and energy of particles in solids.
Particles are held close together in a fixed, regular arrangement with low energy, allowing only vibration
Solids generally have the highest density.
What characterizes the arrangement of particles in liquids?
Weaker forces of attraction, particles can move past each other, and form irregular arrangements
Liquids have more energy than solids but are generally less dense.
How do particles behave in gases?
Almost no forces of attraction, particles have high energy, move freely in random directions
Gases are generally less dense than liquids.
What is the relationship between density and the states of matter?
Density is a measure of the ‘compactness’ of a substance
It relates to the arrangement and energy of the particles in solids, liquids, and gases.
What is the symbol for density in the General Letter?
p
Density can also be expressed in grams per liter (g/L).
Fill in the blank: The density of gases is generally _______ than that of liquids.
less dense
Gases have low densities compared to liquids.
True or False: The particles in a solid have more energy than those in a liquid.
False
Particles in a solid have less energy than those in a liquid.
