Jessicadiaz8602
16.10.2020 •
Chemistry
Which of the following describes a covalent bond?
-It is the sharing of electrons between atoms with an electronegativity difference ABOVE 1.7.
or
-It is the sharing of electrons between atoms with an electronegativty BELOW 1.7.
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Ответ:
Below
Explanation:
Electronegativity ranging from 1.7 to 4.0 are ionic bonds
Ответ:
The correct statement is a pure substance because it is a compound.
Explanation:
A pure substance is defined as the substance which is formed by same or different type of atoms which are chemically combined in a fixed ratio by mass. Compounds and elements are considered as pure substances.
Impure substances are defined as the substances which do not have definite chemical composition. They are basically mixtures of substances which are not chemically combined.
A compound is a substance which is formed by two or more different type of atoms when they chemically combine.
An element is defined as the substance which have only one type of atoms.
Emerald is a compound having chemical formula of . This is considered as a pure substance.
Hence, the correct statement is a pure substance because it is a compound.