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Tag: What is the basis for Daltons theory of mass

what chemical laws can be explained by dalton’s atomic theory

what chemical laws can be explained by dalton’s atomic theory插图

DaltonJohn DaltonJohn Dalton FRS was an English chemist, physicist, and meteorologist. He is best known for introducing the atomic theory into chemistry, and for his research into color blindness, sometimes referred to as Daltonism in his honour.en.wikipedia.orgbased his theory on two laws:the law of conservation of mass and the law of constant composition. The law of conservation of mass says that matter is not created or destroyed in a closed system. That means if we have a chemical reaction, the amount of each element must be the same in the starting materials and the products.

What is the basis for Dalton’s theory of mass?

Basis for Dalton’s theory. Dalton based his theory on two laws: the law of conservation of mass and the law of constant composition. The law of conservation of mass says that matter is not created or destroyed in a closed system.

Which law is not violated by Dalton’s atomic theory?

Dalton’s atomic theory does not contradict any of the proportional laws, including the law of constant proportions, the law of multiple proportions, and the rule of conservation of mass. The approach offers a framework for distinguishing between elements and compounds.

What did Dalton say all matter is made of?

Part 1: All matter is made of atoms. Dalton hypothesized that the law of conservation of mass and the law of definite proportions could be explained using the idea of atoms. He proposed that all matter is made of tiny indivisible particles called atoms, which he imagined as solid, massy, hard, impenetrable, movable particle (s).

What are the two laws of Conservation of mass and composition?

Dalton based his theory on two laws: the law of conservation of mass and the law of constant composition. The law of conservation of mass says that matter is not created or destroyed in a closed system. That means if we have a chemical reaction, the amount of each element must be the same in the starting materials and the products.

What have we learned since Dalton proposed his theory?

The short answer: a lot! For instance, we now know that atoms are not indivisible —as stated in part one—because they are made up of protons, neutrons, and electrons. The modern picture of an atom is very different from Dalton’s "solid, massy" particle. In fact, experiments by Ernest Rutherford, Hans Geiger, and Ernest Marsden showed that atoms are mostly made up of empty space.

What did Dalton say about gold?

Dalton proposed that every single atom of an element, such as gold, is the same as every other atom of that element. He also noted that the atoms of one element differ from the atoms of all other elements. Today, we still know this to be mostly true. A sodium atom is different from a carbon atom. Elements may share some similar boiling points, melting points, and electronegativities, but no two elements have the same exact set of properties.

What did Dalton think of the law of conservation of mass?

He proposed that all matter is made of tiny indivisible particles called atoms, which he imagined as "solid, massy, hard, impenetrable, movable particle (s)".

What was the first complete attempt to describe all matter in terms of atoms and their properties?

Dalton’s atomic theory was the first complete attempt to describe all matter in terms of atoms and their properties.

Why did Dalton’s theory have to be modified?

Part two of Dalton’s theory had to be modified after mass spectrometry experiments demonstrated that atoms of the same element can have different masses because the number of neutrons can vary for different isotopes of the same element. For more on isotopes, you can watch this video on atomic number, mass number, and isotopes.

What is molecular modeling kit?

A basic molecular modeling kit, including spherical atoms of different size and color that can be connected by sticks to represent chemical bonds. Image credit: "Photo of modeling kit" by Sonia on Wikimedia Commons, CC-BY 3.0

What are the two laws that Dalton based his theory on?

Dalton based his theory on two laws: the law of conservation of mass and the law of constant composition.