STRUCTURE OF MATTER Flashcards
What are the four centuries of discovery
-Greek Atom
-Dalton Atom
-Thomson Atom
-Bohr Atom
What are the four substances in Greek Atom?
Air, Earth, Water, Fire
What are the four basic essences in Greek Atom?
Wet, Dry, Hot, Cold
Term that is used in Greek Atom and its meaning
Atom which means “ indivisible “
It is the smallest particle that has all the properties of an element
Atom
Atom is the smallest particle that has all the properties of an _______
Element
What is the full name of the English teacher that described the Dalton Atom
John Dalton
When did John Dalton described the Dalton Atom?
1808
Best describes the Dalton Atom
Hook and Eye Affair
This particle determines the element
Proton because they are the atomic number of an element
Who made the first periodic of elements?
Dmitri Mendeleev
This determines the elemental groupings of elements
Placements of electrons in each atom
Thomson Atom is also known as
Plum pudding with the plums representing the electrons
Who described the plum pudding atom and says that electrons were the integral part of all atoms?
J.J. Thomson
Explain the Thomson Atom
The plums represents the electrons and the pudding represents the shapeless mass of uniform positive electrification
Who disproved J J. Thomson Atom?
Ernest Rutherford
Explain Nuclear Atom
Its states that atom contains a small, dense, and positively charged center surrounded by a negative cloud of electrons.
When and who introduced Bohr Atom
In 1913, Niels Bohr introduced Bohr Atom
Explain Bohr Atom
It contains a smal, dense and positive ly charged nucleus surrounded by negatively charged electrons that revolve in a fixed, well defined orbits about the nucleus.
TRUE OF FALSE:
In a normal atom, the number of electrons is equal to the number of protons (positive charges in the nucleus).
TRUE
