Atomic Theory Flashcards
Father of atomic theory
John Dalton
John dalton was an _ scientist
English
In 1803, John dalton proposed
Theory of the atom
John dalton proposed the theory of the atom in year
1803
John dalton believed that atoms cannot be
Broken down further
Dalton believed that all mater is made of
Atoms
Dalton believed that atoms within an element are
The same
Dalton believed that atoms from different elements are not
The same
Atoms are rearranged during
A chemical reaction
Atoms rearranged during a chemical reaction but are not lost is the law of
Conservation of Mass
Compounds are formed when
Atoms from two or more elements combine (H2O)
In any compound, the ratio of the number of atoms to one another is
A whole number
In any compound, the ratio of the number of atoms to one another is a whole number (law)
Law of Multiple Proportions
Ratio of number of atoms to one another whole number (example)
CO2 (1c,2o)
Law of Multiple Proportions states that if two elements combine to form more than one compound
The masses of one element will combine with the other elements in a whole number ratio
Atoms and molecules are the smallest particles a substance can be and
Still retain its chemical and physical properties
Another English physicist named
J.J. Thomson
J.J. Thomson discovered the
Electron
J.J Thomson proposed the _ model of the atom
Plum pudding
J.J. Thomson discovered the electron in year _ disproving Dalton’s theory that the atom can’t be broken down
1897
Thomson used the idea of
Radiation
Radiation is energy that is transmitted in the form of (3)
Waves
Particles
Rays
