Identify the major players in the early development of atomic theory.

-Democritus, Dalton, Becquerel, Rontgen, Curie, Thomson , Rutherford, Millikan, -Gilbert: distinguished electrical attraction from magnetism -Proust: Law of Constant Composition (did samples of a pure substance always contain the same proportion of

major conclusions drawn from the gold foil experiment:

-atom is mostly empty space -nucleus is very dense -nucelus has a positive charge -nucelus has protons and neutrons

conclusions of cathode ray experiment:

-discovered the elctron (- charged particles) COMMON TO ALL MATTER -atoms are divisible -mass-chage ratio -electrons are building blocks

conclusion of oil drop experiment: (not a lot of questions on this)

measured exact charge and mass of electron

Total mass remains constant during a chemical reaction in a closed system.

Law of conservation Mass Model: same atoms js arranged differently in a sqaure

When two elements form different compounds, the masses of one combining with a fixed mass of the other are in small whole- number ratios.

Law of Multiple Proportions d a l t o n Example: carbon and oxygen when have different number of atoms can form carbon monoxide or carbon dioxide

Different samples of a pure substance always contains the same proportions of elements by mass

Law of Definite proportions / law of constant composition elements combine in fixed proportions water is always 11% H and 89% O

Whats the difference between isotopes, ions and dif elements:

basically • Different Elements are determined strictly by the number of protons. Changing the proton count creates an entirely different chemical element. -Isotopes are versions of the same element with a different number of neutrons. They have the same

identify different parts of a mass spectrometer and explain how it works

used to seperated isotopes of an element seperated ions based on their size by charging the particles and exposing them to a magnetic field -heavier isotopes bend less -light isotopes bend more Look at diagram for parts

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Question	Answer
Identify the major players in the early development of atomic theory.	-Democritus, Dalton, Becquerel, Rontgen, Curie, Thomson , Rutherford, Millikan, -Gilbert: distinguished electrical attraction from magnetism -Proust: Law of Constant Composition (did samples of a pure substance always contain the same proportion of
Use diagrams to explain electrostatics, and how the gold foil, cathode ray, and oil drop experiments work.
major conclusions drawn from the gold foil experiment:	-atom is mostly empty space -nucleus is very dense -nucelus has a positive charge -nucelus has protons and neutrons
conclusions of cathode ray experiment:	-discovered the elctron (- charged particles) COMMON TO ALL MATTER -atoms are divisible -mass-chage ratio -electrons are building blocks
conclusion of oil drop experiment: (not a lot of questions on this)	measured exact charge and mass of electron
Total mass remains constant during a chemical reaction in a closed system.	Law of conservation Mass Model: same atoms js arranged differently in a sqaure
When two elements form different compounds, the masses of one combining with a fixed mass of the other are in small whole- number ratios.	Law of Multiple Proportions d a l t o n Example: carbon and oxygen when have different number of atoms can form carbon monoxide or carbon dioxide
Different samples of a pure substance always contains the same proportions of elements by mass	Law of Definite proportions / law of constant composition elements combine in fixed proportions water is always 11% H and 89% O
Whats the difference between isotopes, ions and dif elements:	basically • Different Elements are determined strictly by the number of protons. Changing the proton count creates an entirely different chemical element. -Isotopes are versions of the same element with a different number of neutrons. They have the same
identify different parts of a mass spectrometer and explain how it works	used to seperated isotopes of an element seperated ions based on their size by charging the particles and exposing them to a magnetic field -heavier isotopes bend less -light isotopes bend more Look at diagram for parts

Created by: Jocelyn_Theriault

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