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Dalton's first flaw is that all matter is composed of extremely small particles called atoms. He states that atoms can never subdivided nor changed into another, which is incorrect; observations of the behaviour of discharge tubes could be explained only of the atom could be subdivided into even smaller electrically charged particles.
-When electricity is turned on, current flows between the elctrodes, and the air in the tube begins to glows. If the air is sucked out, an invisible ray continues to pass between the electrodes. When phosphour was put in the tube, it gave off light as it was subjecte to radiation. The light is given off in flashes; this suggests that elcetricity is moving through the tube as indivdual particles.
-Scientists discovered that the charged particles were moving from cathode (+ve) to the anode (-ve).A phosphour screen with a slit was placed in the tube at a slant beyond a metal plate with a slit in it on the side of the anode. Since the whole screen did not glow, opposite to the straight line of light that appeared; this meant that the chraged particles were coming fromn the cathode. These invisiblke rays are called cathode rays. If electrically charged plates are placed above and below the discharged tubes, the cathode ray is deflected towards the positive plate.Thus the cathode rays consist of negative particles.
He also stated that all atoms of one element are identical, however they differ in mass, which are called isotopes, so he is wrong. ex. Natural Carbon; one atom (isotope) constitutes 98.90%, the other 1.10 %. Carbon-12 is a reference standard- 12 Atomic Mass units (u). One u is 1/12 the mass of a carbon-12 atom.
Hope this clears it for you.
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The weight in daltons of one atom of an element is?
equal to the atomic mass of the element expressed in daltons. It is essentially the mass of one mole of the element in grams.
How many daltons does one molecule of water have?
One molecule of water has a total molecular weight of approximately 18 daltons. This weight is calculated by adding the atomic weights of two hydrogen atoms (each 1 dalton) and one oxygen atom (approximately 16 daltons).
What are the sub atomic particles for john daltons model?
In John Dalton's model, the subatomic particles are electrons, protons, and neutrons. Electrons are negatively charged particles found in the electron cloud surrounding the nucleus. Protons are positively charged particles located in the nucleus. Neutrons are neutral particles also found in the nucleus.
What is the molecular weight of the compound in daltons and how does it convert to grams per mole (g/mol)?
The molecular weight of a compound is the sum of the atomic weights of all the atoms in the molecule. It is measured in daltons (Da) and is equivalent to grams per mole (g/mol). To convert from daltons to grams per mole, you can use the conversion factor 1 Da 1 g/mol.
What is the molar mass of a substance in daltons?
The molar mass of a substance in daltons is the mass of one mole of that substance, measured in daltons.
When was john daltons atomic model billliard model made?
see along time ago before dinosaurs walked the earth. the end.
What experiment did daltons use for his atomic theory?
dalton wasnt the one who experimented with gold, rutherford was the one who did the gold foil experiment.
How does Daltons atomic theory explain the law of definite proportions?
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What where Daltons experiments?
John Dalton was concerned by the problems of color blindness, meteorology, measurement of altitude, gas laws, atomic weights, structure of the matter, etc.
What is John Dalton's scientific attitude?
what is john daltons scientific attitude
The weight in daltons of one atom of an element is?
equal to the atomic mass of the element expressed in daltons. It is essentially the mass of one mole of the element in grams.
What is the approximate mass of a neon-11 atom?
The approximate mass is 11. Technically you could express this in units of daltons as 11 Da (Daltons previously called amu, atomic mass unit, or as 11 (the dimensionless, relative atomic mass which chemists simply call atomic weight) .
If the atomic mass of oxygen is 16 and the atomic mass of hydrogen is 1 how do the current atomic masses compare to daltons?
Atoms are made up of protons, neutrons, and electrons. The atomic mass listed on the periodic table is an average of all the isotopes of an element, which includes the mass of the protons and neutrons. Therefore, the atomic masses listed for oxygen (16) and hydrogen (1) are in daltons.
What is the atomic mass of neon'?
The approximate mass is 11. Technically you could express this in units of daltons as 11 Da (Daltons previously called amu, Atomic Mass unit, or as 11 (the dimensionless, relative atomic mass which chemists simply call atomic weight) .
Which tenet of Daltons atomic theory did Thomson disprove?
Atoms cannot be divided into smaller particles.
What main feature of daltons atomic model was abandoned after thomson's discoveries?
The idea that atoms are indivisible.
What was john Daltons job?
he worked at the circus as a proffesional clown
