chemistry-unit 2

unit-2:structure of atom

the existance of atom has been proposed since time of early____and____philosophers

→indian and greek

the word atom is derived from the greek word_____meaning______

→’a-tomos’,meaning uncuttable or non-divisible

_____thought that all materials are made up four things called earth,air,water,fire in the 5th BC

→Empedocles

plato is the student of_____and the teacher of______

→socratus,aristotle

_____adapted empedocles theory and wined the term elements to describe the four substances

→plato

______introduced the idea that elements can be differentiated based on properies

→aristotle(also adapted empedocles concept of 4 atoms)