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Q: What is it called when the elements that make up a compound always occur in the same mass proportion?
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What is a material that contains three elements joined in a fixed proportion?

If a material contains three elements joined in a fixed proportion, then it is a compound. It can only be separated by a chemical reaction.


What substance that contains 2 or more elements chemically combined in a fixed proportion?

A substance made of two or more elements chemically combined in a specific proportion is called a compound. A substance composed of two or more elements combined chemically in a fixed proportion by mass is called a compound. A chemical compound can be held together by a covalent bond or an ionic bond.


If a material contains three elements joined in a fixed proportion it is a(an)?

A material that contains three elements joined in a fixed proportion is a pure substance called a compound. It is not a mixture.


What is a chemical combination of two or more different elements joined together in a fixed proportion called?

It is called a compound


What is a substance made of two or more elements chemically combined in a specific proportion is called a?

This is a chemical compound.


What is compound proportion?

"'''The proportion involving two or more quantities is called Compound Proportion'''" By: Issachar Frankincense


The statement that in any chemical compound the masses of elements are allways in the same proportion is called what?

This is Dalton's Law of fixed proportions.


Is a substance in which all the exact combinations of elements are always the same?

A substance in which the exact combination of elements is always the same, is called a compound.


What is the rule of constant proportions?

The law of constant proportions, also called Proust's law, states that the elements in a compound are all present in a fixed proportion by weight, regardless of how the compound is prepared.


Elements and Compounds are called?

Elements and compounds are called substance....subtances can be either elements or compound....an elementis a substance that cannot be separated into simpler substances by ordinary means...!!a compound is a pure substance that contains two or more elements combined in afixed proportion.......example of the formation of a comp. :1. Sodium plus chlorine --> sodium chloride


Who developed the law of definite composition?

In chemistry, the law of definite proportions and also the elements, sometimes called Proust's Law, states that a chemical compound always contains exactly the same proportion of elements by mass. An equivalent statement is the law of constant composition, which states that all samples of a given chemical compound have the same elemental composition.This observation was first made by the French chemist Joseph Proust based on several experiments conducted between 1798 and 1804. Based on such observations, Proust made statements like this one, in 1806:


The statement that a chemical compound always contains the same elements in exactly the same proportions is called the law of?

"In chemistry, the law of definite proportions and also the elements, sometimes called Proust's Law, states that a chemical compoundChemical_compoundalways contains exactly the same proportion of elementsChemical_elementby mass. An equivalent statement is the law of constant composition, which states that all samples of a given chemical compound have the same elemental composition." - Wikipedia