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Author Topic:   atoms
marie emerald
(Moderator) 		posted 9/21/06 3:16 AM     Click here to send email to marie emerald  



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ALUNAN posted 10/11/06 11:16 AM    
YES BY COMPARING MY INITIAL IDEA TO THE ORIGINAL MODEL OR ABOUT THE INFORMATION OF AN ATOM.
cahoy posted 10/11/06 12:12 AM    
i think its dalton cause he is the one i know in the atomic theory
pelayre posted 10/11/06 12:24 AM    
Leccipus & Democrotus where the first who have originated aout atom.Then by that John Dalton formulated the ATOMIC THEORY. While j.j. Thomson,Ernest Rutherford, Neil BOHRsupported the sub atomic parts of he atom.for me dalton contributed the most for he developed the things abou the atom.
Tamsi posted 10/12/06 4:18 AM    
The most who contribute about the atomic theory is John Dalton because he clearly explained .But it is also followed by Rutherford,Bohr,J.J.Thompson and mANY MORE wHO SUPPORTED AND CONTINUE..
flores posted 10/12/06 4:56 AM    
Leccipus & Democrotus where the first who have originated aout atom.Then by that John Dalton formulated the ATOMIC THEORY. While j.j. Thomson,Ernest Rutherford, Neil BOHRsupported the sub atomic parts of he atom.for me dalton contributed the most for he developed the things abou the atom.
jabulin posted 10/12/06 4:57 AM    
Leccipus & Democrotus where the first who have originated aout atom.Then by that John Dalton formulated the ATOMIC THEORY. While j.j. Thomson,Ernest Rutherford, Neil BOHRsupported the sub atomic parts of he atom.for me dalton contributed the most for he developed the things abou the atom.
divinagracia posted 10/12/06 5:12 AM    
These particles were called cathode rays because they originated from the cathode. Numerous experiments made by Julius Plucker, Johann Hittarf, William Crookes, and others showed that cathode rays exhibited the following properties:a. Cathode rays are emitted from the cathode when electric current is passed through an evacuated tube containing a gas at very low pressure.b. The rays travel in a straight line as indicated by the shadow cast by small objects placed along its path. Metal objects struck by the rays become red hot.c. The cathode rays upon striking a zinc sulfide (fluorescent) screen, cause it to emit random flashes of light.d. The cathode rays have a negative charge. This is shown by the fact that they are attracted toward positively charged metal plates held outside the tube.3. Joseph John Thomson (1856-1940), an English physicist, after a series of investigations, established the particle nature of cathode rays.He determined the velocity these particles and the ratio of electric charge (e) to mass (m), e/m.4. The value is about –1.759 x 108 coulombs/gram. He further concluded that cathode rays are negatively charged and are fundamental particles of matter. Later they were called electrons.5. Thomson helped revolutionize the knowledge of atomic structure by his discovery of the electrons.
divinagracia posted 10/12/06 5:13 AM    
These particles were called cathode rays because they originated from the cathode. Numerous experiments made by Julius Plucker, Johann Hittarf, William Crookes, and others showed that cathode rays exhibited the following properties:a. Cathode rays are emitted from the cathode when electric current is passed through an evacuated tube containing a gas at very low pressure.b. The rays travel in a straight line as indicated by the shadow cast by small objects placed along its path. Metal objects struck by the rays become red hot.c. The cathode rays upon striking a zinc sulfide (fluorescent) screen, cause it to emit random flashes of light.d. The cathode rays have a negative charge. This is shown by the fact that they are attracted toward positively charged metal plates held outside the tube.3. Joseph John Thomson (1856-1940), an English physicist, after a series of investigations, established the particle nature of cathode rays.He determined the velocity these particles and the ratio of electric charge (e) to mass (m), e/m.4. The value is about –1.759 x 108 coulombs/gram. He further concluded that cathode rays are negatively charged and are fundamental particles of matter. Later they were called electrons.5. Thomson helped revolutionize the knowledge of atomic structure by his discovery of the electrons.
divinagracia posted 10/12/06 5:13 AM    
These particles were called cathode rays because they originated from the cathode. Numerous experiments made by Julius Plucker, Johann Hittarf, William Crookes, and others showed that cathode rays exhibited the following properties:a. Cathode rays are emitted from the cathode when electric current is passed through an evacuated tube containing a gas at very low pressure.b. The rays travel in a straight line as indicated by the shadow cast by small objects placed along its path. Metal objects struck by the rays become red hot.c. The cathode rays upon striking a zinc sulfide (fluorescent) screen, cause it to emit random flashes of light.d. The cathode rays have a negative charge. This is shown by the fact that they are attracted toward positively charged metal plates held outside the tube.3. Joseph John Thomson (1856-1940), an English physicist, after a series of investigations, established the particle nature of cathode rays.He determined the velocity these particles and the ratio of electric charge (e) to mass (m), e/m.4. The value is about –1.759 x 108 coulombs/gram. He further concluded that cathode rays are negatively charged and are fundamental particles of matter. Later they were called electrons.5. Thomson helped revolutionize the knowledge of atomic structure by his discovery of the electrons.
guzman posted 10/12/06 5:15 AM    
These particles were called cathode rays because they originated from the cathode. Numerous experiments made by Julius Plucker, Johann Hittarf, William Crookes, and others showed that cathode rays exhibited the following properties:a. Cathode rays are emitted from the cathode when electric current is passed through an evacuated tube containing a gas at very low pressure.b. The rays travel in a straight line as indicated by the shadow cast by small objects placed along its path. Metal objects struck by the rays become red hot.c. The cathode rays upon striking a zinc sulfide (fluorescent) screen, cause it to emit random flashes of light.d. The cathode rays have a negative charge. This is shown by the fact that they are attracted toward positively charged metal plates held outside the tube.3. Joseph John Thomson (1856-1940), an English physicist, after a series of investigations, established the particle nature of cathode rays.He determined the velocity these particles and the ratio of electric charge (e) to mass (m), e/m.4. The value is about –1.759 x 108 coulombs/gram. He further concluded that cathode rays are negatively charged and are fundamental particles of matter. Later they were called electrons.5. Thomson helped revolutionize the knowledge of atomic structure by his discovery of the electrons.
guzman posted 10/12/06 5:16 AM    
These particles were called cathode rays because they originated from the cathode. Numerous experiments made by Julius Plucker, Johann Hittarf, William Crookes, and others showed that cathode rays exhibited the following properties:a. Cathode rays are emitted from the cathode when electric current is passed through an evacuated tube containing a gas at very low pressure.b. The rays travel in a straight line as indicated by the shadow cast by small objects placed along its path. Metal objects struck by the rays become red hot.c. The cathode rays upon striking a zinc sulfide (fluorescent) screen, cause it to emit random flashes of light.d. The cathode rays have a negative charge. This is shown by the fact that they are attracted toward positively charged metal plates held outside the tube.3. Joseph John Thomson (1856-1940), an English physicist, after a series of investigations, established the particle nature of cathode rays.He determined the velocity these particles and the ratio of electric charge (e) to mass (m), e/m.4. The value is about –1.759 x 108 coulombs/gram. He further concluded that cathode rays are negatively charged and are fundamental particles of matter. Later they were called electrons.5. Thomson helped revolutionize the knowledge of atomic structure by his discovery of the electrons.
macapelit posted 10/12/06 10:05 AM    
John Dalton in the nineteenth century (1766-1844)performed many experiments which led to the formulation of Daltons Atomic Theory.He said that the atom (particles)of one element combine with those of another element in forming another kind of particles called molecules of a compound.
MAGSALAY posted 10/12/06 12:01 AM     Click here to send email to MAGSALAY  
Leccipus & Democrotus where the first who have originated aout atom.Then by that John Dalton formulated the ATOMIC THEORY. While j.j. Thomson,Ernest Rutherford, Neil BOHRsupported the sub atomic parts of he atom.for me dalton contributed the most for he developed the things abou the atom.
muit posted 10/13/06 12:52 AM    
Leccipus & Democrotus where the first who have originated aout atom.Then by that John Dalton formulated the ATOMIC THEORY. While j.j. Thomson,Ernest Rutherford, Neil BOHRsupported the sub atomic parts of he atom.for me dalton contributed the most for he developed the things abou the atom.
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