Composition of Matter and Dalton's Atomic Theory

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What is matter?

Anything that has mass and occupies space

What is an atom?

An extremely small particle of matter that retains its identity during chemical reactions

According to Dalton's atomic theory, what is all matter composed of?

Indivisible atoms

Define an element.

A type of matter composed of only one kind of atom, each atom of a given kind having the same property

What is a compound?

A type of matter composed of atoms of two or more elements chemically combined in fixed proportions

What is a chemical reaction?

The rearrangement of the atoms present in the reacting substances to give new chemical combinations present in the substances formed by a reaction

What is the Law of combination of mass?

Mass can neither be created nor destroyed in a chemical reaction, or the total mass remains constant in a chemical reaction

What is the Law of definite proportions?

A pure compound, whatever its source, always contains definite or constant proportions of the element by mass

Test your knowledge about the composition of matter, atoms, elements, and compounds as described by Dalton's atomic theory. Learn about the fundamental particles that make up all matter and their properties.

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