All water molecules consist of hydrogen and oxygen atoms with a ratio of H: O = 2: 1
Further explanation
The development of atomic theory starts from the first term conveyed by Greek scientists who suggested that every substance has the smallest particles so that the word atomos appears, which means it cannot be divided. So, John Dalton, a British scientist put forward the hypothesis about atoms:
- 1. The elements are composed of atoms which cannot be subdivided
- 2. Atoms that make up the same elements have the same properties, mass, and size
- 3. Compounds are composed of two or more atoms in a fixed ratio
- 4. In chemical reactions, atoms after and before a reaction cannot be destroyed, only separation and reassembly occurrences
Dalton conducts research on compounds.
Dalton's law of multiple comparisons states that if elements are formed two or more kinds of compounds, if the mass of one of the elements is known to be the same / fixed, then the mass of the second element in the two compounds will have a ratio as a simple integer.
Compounds made up of the same atom will have the same atomic ratio
From Dalton's atomic theory shows that all water molecules are composed of two atoms, namely oxygen and hydrogen and have the same ratio, two hydrogen atoms for every one oxygen atom.
Learn more
Bohr's model of the atom
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Rutherford performed the gold foil experiment
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The part of an atom that is mostly empty space
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Keywords: atom, Dalton, compound, water molecule, ratio
