Particle Theory
What is chemistry?
Chemistry is the study of matter.
Which change is it if you accidentally break a beaker?
physical: shape change
What is the most basic unit of matter known as?
The most basic unit of matter is known as an, "Atom."
If you touch an object, you could describe this property.
Texture
What is the definition of volume?
how much space a substance takes up
A gases particles have this type of shape
gas particles fill the container they are in.
What change is it if a log catches on fire?
chemical
What do we call a pure substance that cannot be broken down any further?
A pure substance that cannot be broken down any further is an "Element."
This type of property you might not know until you actually test it out.
a chemical property
What is the GRASS method of solving problems?
Given, Required, Analysis, Solve, Statement
When liquid water freezes into ice, this is happening to the movement of the water particles.
they are slowing down
Which change is easier to reverse?
Physical
When you mix hot chocolate powder into water, you are making this type of matter
SOLUTION (or HOMOGENOUS MIXTURE)
The chemical properties of matter are...
flammability, toxicity and reactivity
Swim meet (I miss you all!!)
According to particle theory, molecules in a solid are this far apart
evaporating makes steam. what type of change?
What is compound?
A compound is any combination of two or more atoms of DIFFERENT elements.
physical property that is quantitative
mass: grams
volume: mL or cm^3
If someone across the room has some pizza, why can you smell it?
the gas particles that are steaming off of the pizza try to fill the space of the container they are in (the room). They eventually reach your nose.
CPEG: colour, precipitate, energy change or gas produced
What is the difference between an atom and a compound?
an atom is one type of particle (element) but a compound is 2+ elements bonded together
if you have the mass and the volume of a substance, which property could you calculate?
Density
What is the difference between a homogeneous and a heterogeneous mixture
homologous: can see 1 thing but is actually a mixture of particles (evenly spaced)
heterogeneous: can see multiple things and is multiple particles (unevenly spaced)