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What is a chemical combination of two or more substances?
Chemical Mixtures A mixture refers to the physical combination of two or more substances in which the identities of the individual substances are retained. Mixtures take the form of alloys, solutions, suspensions, and colloids.
Which type of substance is formed by the chemical combination?
A compound is a pure substance formed from two or more elements combined chemically in a definite proportion by weight.
What is a pure substance that can be broken down into simpler substances by chemical means?
elements
Gold, silver, and oxygen are examples of elements. Compounds are pure substances formed by the combination of elements; they can be decomposed by ordinary chemical means.
What substances make up a mixture?
In chemistry, a mixture is a material made up of two or more different chemical substance/substances which are not chemically combined. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions and colloids.
Is formed when substances are combined?
A mixture is created when two or more different substances are physically combined and can be separated back into its original substances. A chemical reaction occurs when two or more substances are combined to form a new substance and cannot be separated back into its original substances.
Which substance can be broken down by a chemical change?
Compounds
Compounds are substances composed of two or more elements chemically combined that can be separated into simpler substances only by chemical means. Water, for example, is a compound because pure water is composed of only H2O molecules.
Which is a substance that Cannot be broken down into simpler substances by physical or chemical means multiple choice question?
element
An element is a pure substance that cannot be separated into simpler substances by chemical or physical means. There are about 117 elements.
What is a mixture give two example of mixtures?
Mixtures are the substances composed of two or more forms of matter. You can separate them by physical methods. Such examples include a mixture of salt and water, a mixture of sugar and water, different gases, air, etc. In any mixture, the various components do not form through any kind of chemical changes.
When two or more elements combine to form a new substance?
When two or more elements combine to form a new substance, it is called a compound. A compound is made when atoms of two or more elements bond in a chemical reaction. Two hydrogen atoms and one oxygen atom bond to form a molecule of water (H2O). A molecule is the smallest part of a compound.
What is a substance that can be separated by chemical change?
A substance that can be separated into two or more substances only by a chemical change is a. Answer: compound. Explanation: i) solution is a homogenous mixture and it can be separated by physical media. For example, a brine: you can evaporate the water from the salt by heating the solution (brine)
What is the difference between a substance and a mixture?
a pure substance made up of atoms of 2 or more different elements joined together by chemical bonds. mixture. a combination of 2 or more subtances that are not chemically combined. Not a pure subtance. pure substance. a sample of matter, either a single element or a single compound, that has definite chemical and physical properties.
What is meant by a pure substance?
pure substance that cannot be broken down into simpler substances by chemical or physical means. Each element has unique physical and chemical properties. compound. a pure substance made up of atoms of 2 or more different elements joined together by chemical bonds.