Question

The properties of several unknown solids were measured. Solid Melting point Other properties A >1000 °C does not conduct electricity B 850 °C conducts electricity in the liquid state, but not in the solid state C 750 °C conducts electricity in the solid state D 150 °C does not conduct electricity Classify the solids as ionic, molecular, metallic, or covalent. Note that covalent compounds are also known as covalent network solids or macromolecular solids.

Answer 1

Explanation:

A solid compound formed by chemical reaction of a positively charged cation with a negatively charged anion is known as ionic solid. Ionic bonds exist between an ionic solid.

When dissolved in water, ionic solids dissociate into ions. Hence, they are able to conduct electricity as electricity is the flow of ions or electrons.

A molecular solid is a solid in which molecules are held together by Vander waal forces. They do not conduct electricity as there is no unbalanced charge on the compound.

Solids in which atoms of metal are held together by metallic bonds are known as metallic solids. These conduct electricity when present in solid state for bond overlap.

A covalent solid is a substance in which atoms are held together by covalent bonds. They do not conduct electricity and have high melting point.

Thus, we can conclude the following.

• A >1000 °C does not conduct electricity : Covalent solids

• B 850 °C conducts electricity in the liquid state, but not in the solid state : Ionic solid

• C 750 °C conducts electricity in the solid state : Metallic solid

• D 150 °C does not conduct electricity : Molecular solid

 

Answer 2

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

Further Explanation

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

1. acid
2. bases
3. ionic compound
4. salt
5. the oxide
6. organic compound

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Details

Grade: College

Subject: Chemistry

keywords: Chemical compounds