Composition of matter

Question 1

Composition of matter

Answer 1

Can it be physically separated?
No: Pure substance——>can it be simplified chemically? No: element/Yes: compound
Yes: Mixture—->is it uniform? No:heterogenous/yes: homogenous

Question 2

Solutions (homogenous mixtures)

Answer 2

Molecules are much smaller and tend to be semi-transparent. Ex: water.

Question 3

Colloids (homogenous mixture)

Answer 3

There are bigger molecules. Ex: blood

Question 4

Suspensios (homogenous mixtures)

Answer 4

Tend to have chunks, after a while it will separate. Ex: mud.

Question 5

States of matter

Answer 5

Change of energy causes changes in states of matter.
Gas:no volume, no shape.
Liquid:volume, no shape
Solid: volume & shape.
Plasma: ionized gas, lots of energy, particles keep on crashing with each other.
BE condensate: super still, atoms appear to be fusing, “super atom”.

Question 6

Tyndal effect

Answer 6

Particles in colloids and suspensions reflect light. Solutions don’t.

Question 7

Changes in states of matter

Answer 7

Ionization:gas—>plasma
Deionization:plasma—>gas

Evaporation:liquid—>gas
Condensation:gas—>liquid

Sublimation:solid—>gas
Deposition:gas—>solid

Freezing:liquid—>solid
Melting:solid—>liquid