Covalent compounds:
a)are formed from one metal and one nonmetal
b) exchange electrons in a chemical bond
c) have a low melting point
d)have weaker bonds than ionic compounds
Which answer would be correct i think maybe B
The correct option is c i.e, have a low melting point. Covalent compounds have a low melting point due to weaker intermolecular forces. They are formed from two or more nonmetal elements and share electrons in a chemical bond.
Understanding the properties of covalent compounds is essential in Chemistry. Let's analyze each option provided:
Option A: Covalent compounds are not formed from one metal and one nonmetal. Instead, they are formed from two or more nonmetal elements.Option B: This option is incorrect because, in covalent bonds, atoms share electrons rather than exchange them.Option C: Covalent compounds indeed have a low melting point compared to ionic compounds. This is due to the weaker intermolecular forces present in covalent compounds.Option D: Correct. Covalent bonds generally have weaker bonds than ionic compounds, making it easier to melt or boil covalent compounds.Given the above explanations, the correct answer is Option C: Covalent compounds have a low melting point.
A burning match is an example of a chemical change phase change nuclear change physical change
A burning match is an example of a chemical change. The transformation of two or more reactants into new compounds.
The term "chemical change" describes a process when one or more compounds are changed into new substances with new chemical properties. The atoms of the original substances rearrange themselves to establish new chemical bonds during a chemical transition, producing new molecules or compounds.
An illustration of a chemical change, in which two or more reactants are changed into new compounds, would be a burning match. Sulphur, wood, and oxygen combine to create smoke and ash when a match is lit.
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