Oquizy

John says graphite is a good lubricant and a good conductor. Which statement explains this?

It contains ionic bonds It has free electrons and layers that can slide It has weak bonds between carbon atoms Its atoms form neutral molecules

In an experiment, a substance has the following properties: - Does not conduct electricity in solid or liquid state - Has a low melting point - Exists as discrete molecules What type of structure does this substance have?

Giant covalent Ionic lattice Metallic lattice Simple molecular

Which of the following substances contains only covalent bonds in its entire structure?

Magnesium chloride Silicon dioxide Sodium Water

What type of bond is formed when atoms share electrons?

Covalent Hydrogen Ionic Metallic

The melting point of sodium chloride is higher than that of water. Why?

Ionic bonds are stronger than hydrogen bonds Sodium chloride contains molecules Sodium chloride is lighter Water contains more atoms

A student draws the dot-and-cross diagram for MgCl₂. Which statement is correct about the ions formed?

Both Mg and Cl share electrons equally Cl gains one electron and becomes Cl⁺ Mg gains two electrons and becomes Mg²⁻ Mg loses two electrons and each Cl gains one

Quiz: Chemistry - Chemical Bonding