1. Explain why the melting points of ionic compounds and molecular compounds differ?

2. A.) What laboratory procedure allows you to test a compound is ionic or molecular?
b.) what results would you expect?

3. A.) What do we call the smallest particle of an element?
b.) what do we call the smallest particle in a compound with ionic bonds?
C.) what do we call the smallest particle of a covalently bonded compound?

For each of the following what type of smallest particle would exist? explain your reasoning?
a.) strontium
B.) CaCl2
C.) CCl4
D.) SO2
E.) helium
F.) bromine
G.) MgO

Please help me on these thanks:)

1. Most ionic compounds have a crystal structure. You must break the chemical bond and tear away the crystal structure. Basically it takes less energy to break the covalent bonds than an ionic bond.

2. Dissolve the compound in water and test the conductivity. Strong electrolytes have high conductivity, weak electrolytes have medium to low conductivity and non-electrolytes have no conductivity. This is not a good test for those ionic compounds that are not soluble in water. For those one can melt the crystal and test the conductivity of the molten solution.

3.
a. atom
b. ion
c. molecule

4.a.) strontium--atoms
B.) CaCl2--ions
C.) CCl4--molecule
D.) SO2--molecule
E.) helium--atom
F.) bromine--moleulce
G.) MgO--ions
You supply the reasoning.

You are a lifesaver thank u soooooo much:)!!!!

1. The melting points of ionic compounds and molecular compounds differ due to the nature of the bonds holding the particles together. Ionic compounds are composed of ions, which are formed from the transfer of electrons between atoms. These ions are held together by strong electrostatic attractions, resulting in a high melting point. In contrast, molecular compounds are composed of molecules, which are held together by covalent bonds formed from the sharing of electrons. The intermolecular forces between these molecules are relatively weaker than the ionic bonds, resulting in a lower melting point for molecular compounds.

2. a) One laboratory procedure that allows us to test whether a compound is ionic or molecular is through conductivity testing. This involves creating an aqueous solution of the compound and measuring its ability to conduct electricity using a conductivity meter. If the compound conducts electricity, it indicates the presence of ions, suggesting that it is an ionic compound. If the compound does not conduct electricity, it suggests that it is a molecular compound.

b) The results we would expect from conductivity testing are as follows:
- If the compound conducts electricity, it suggests the compound is ionic.
- If the compound does not conduct electricity, it suggests the compound is molecular.

3. a) The smallest particle of an element is called an atom.

b) The smallest particle in a compound with ionic bonds is called an ion. It could be a cation (positively charged ion) or an anion (negatively charged ion), depending on whether electrons were lost or gained.

c) The smallest particle of a covalently bonded compound is called a molecule. It consists of two or more atoms held together by shared electrons.

For each of the following compounds, the type of smallest particle would exist as follows:

a) Strontium: This is an element, so the smallest particle would be a strontium atom.

b) CaCl2: This is an ionic compound composed of Ca^2+ cations and Cl^- anions. So, the smallest particles would be Ca^2+ ions and Cl^- ions.

c) CCl4: This is a covalently bonded compound, so the smallest particle would be a molecule consisting of one carbon atom and four chlorine atoms, known as carbon tetrachloride.

d) SO2: This is also a covalently bonded compound, so the smallest particle would be a molecule consisting of one sulfur atom and two oxygen atoms, known as sulfur dioxide.

e) Helium: This is an element, so the smallest particle would be a helium atom.

f) Bromine: This is an element, so the smallest particle would be a bromine atom.

g) MgO: This is an ionic compound composed of Mg^2+ cations and O^2- anions. So, the smallest particles would be Mg^2+ ions and O^2- ions.