The answer is :
- Compound A > 1000 ° C does not conduct electricity and is in the form of covalent solids
- Compound B = 850 ° C conducts electricity in liquid conditions, but not in solid conditions and the form of ionic solids
- Compound C = 750 ° C conducts electricity in solid conditions and the form of metal solids
- Compound D = 150 ° C does not conduct electricity and is in the form of a solid molecule
<h2>Further Explanation
</h2>
Element is a single substance or pure substance that cannot be broken down into simpler substances through chemical reactions. Some chemical scientists have found more than 100 kinds of elements that exist on earth. Based on the periodic system, the elements are grouped into three types, namely metal, semilogene, and non-metal elements.
Chemical compounds are pure chemicals that consist of two or several elements that can be broken down into its constituent elements by chemical reactions. For example, dihydrogen monoxide (water, H2O) is a compound consisting of two hydrogen atoms for each oxygen atom. Generally, this comparison must be fixed because of its physical nature, not a comparison made by humans. Therefore, materials such as brass, YBCO superconductors, "aluminum gallium arsenide" semiconductors, or chocolate are considered mixtures or alloys, not compounds. The distinguishing characteristic of compounds is the presence of chemical formulas. The chemical formula provides a ratio of atoms in a substance, and the number of atoms in a single molecule (therefore the chemical formula of ethene is C2H4 and not CH2. The chemical formula does not specify whether the compound is composed of molecules; for example, sodium chloride (table salt, NaCl) is a compound ionic.
Type of compound
- acid
- bases
- ionic compound
- salt
- the oxide
- organic compound
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Details
Grade: College
Subject: Chemistry
keywords: Chemical compounds