(Chemistry) Introduction to Matter Flashcards
What is Matter?
Anything that has MASS and VOLUME
What is a particle?
A small or singular portion of MATTER
PURE SUBSTANCE
A substance made up of ONE type of particle.
ELEMENTS
A pure substance that cannot be broken down into a simpler chemical substance by any PHYSICAL or CHEMICAL means.
COMPOUND
A pure substance composed of TWO OR MORE ELEMENTS that are chemically JOINED.
MIXTURE
a substance that is made up of AT LEAST TWO DIFFERENT TYPES of particles.
MECHANICAL (HETEROGENOUS) MIXTURE
A mixture in which you can VISUALLY DISTINGUISH between different types of matter. This is also called a HETEROGENOUS MIXTURE
SOLUTION (HOMOGENOUS)
A UNIFORM MIXTURE of two or more substances. This is also called a HOMOGENOUS MIXTURE.
What is the PARTICLE THEORY?
Describes how matter behaves.
Characteristics of Matter (use acronym PISAM)
P - matter is made of PARTICLES
I - pure substances have IDENTICAL particles
S - there is empty SPACE between particles
A - particles ATTRACT each other
M - particles are in constant MOTION
All changes of state involve a loss or gain of ____ which is a form of ______.
All changes of state involve a loss or gain of HEAT which is a form of ENERGY.
Particle STATE OF MATTER is:
SOLID -> LIQUID -> GAS
What are the TWO MIXTURES?
A mechanical mixture and a solution
What happens when a substance is heated?
The particles absorb energy and VIBRATE and MOVE AROUND more
What happens when a substance is cooled?
Particles slow down and move CLOSER together to get rid of SPACE.
