unit 2

Question 1

origins of chem

Answer 1

alchemy, philosophical approach

Question 2

atom

Answer 2

smallest unit of matter that has all the characteristics of that matter

Question 3

by definition chem studies

Answer 3

processes, properties, composition, structure and energy changes in matterele

Question 3

by definition chem studies

Answer 3

processes, properties, composition, structure and energy changes in matterele

Question 4

element

Answer 4

pure substances made from one type of atom

Question 5

compound

Answer 5

composed of two or more elements or atoms, cannot be seperated w/o losing the integrity of the compound

Question 5

compound

Answer 5

composed of two or more elements or atoms, cannot be seperated w/o losing the integrity of the compound

Question 6

physical property

Answer 6

characteristics that can be observed or measured w/o changing the substance
ex.) size, color, texture, mass, temp, density, melting point

Question 7

chemical property

Answer 7

identity of the substance does not change
ex.) phase change
solid -> liquid -> gas

Question 8

chemical property

Answer 8

ability to undergo changes into a different substance (how does it react?)
ex.) decomposition, flammability, oxidation

Question 8

chemical property

Answer 8

ability to undergo changes into a different substance (how does it react?)
ex.) decomposition, flammability, oxidation