SAS 02 Flashcards
(23 cards)
Basic unit of matter and defining structure of an element
Atom
ATOM comes from the Greek word meaning
indivisible
very small particle that is the building block of for an atom
Subatomic particle
THREE TYPES OF SUBATOMIC PARTICLES
-electrons
-protons
-neutron
Subatomic particle that possesses a negative electrical charge
Electron
Subatomic particle that possesses a positive electrical charge
Proton
Subatomic particle that has nno charge associated with it and it is Neutral
Neutron
small, dense, positively charged center of an atom
Nucleus
any subatomic particle found in the nucleus of an atom
Nucleon
an atom that contains all the Electron
Outer (Extranuclear) region
number of protons in the nucleus of an atom
atomic number
sum of the number of protons and the number of neutron in the nucleus of an atom
Mass number
atoms of an element that have the same number of Proton and the same number of electrons but different numbers of neutron
Isotopes
two different element have the same atomic weight or mass number but different atomic number
Isobars
different elements having the same number of neutron
Isotones
earliest known proponent of anything resembling modern atomic theory
Demotricus
he published his modern atomic theory in 1803 and consists of five important points
John Dalton
proposed the existence of indivisible atom as a response to the arguments of parmenides and paradox of Zeno
demotricus
proposed that atom is a sphere of particles to which are embedded particles
Joseph Johnthompson
Disapproved Thompsons theory by the “GOLD FOIL/ FILM EXPERIMENTS”
Ernest Rutherford
Raisin- Bread Model & Plum Pudding Model
Joseph Jon Thompson
Planetary Model
Neils bohr
quantum mechanical model
erwin schrodinger
