Ionic and Covalent Compounds

The video tutorial explains the differences between atoms, molecules, ions, and compounds. It covers examples of substances like helium, hydrogen, and water, identifying them as atoms or molecules. The tutorial also distinguishes between atoms and ions, using aluminum and phosphorus as examples. Finally, it explains the types of compounds, focusing on ionic and covalent compounds, with examples like sodium chloride and water.

What is a molecule?

• A pure element

• A type of ion

• A particle with multiple atoms

• A single atom

Which of the following is a pure element?

• NaCl

• O2

• CO2

• H2O

Which of the following is composed of only one type of atom?

• NH4Cl

• CO2

• Neon

• H2O

What distinguishes an atom from an ion?

• Atoms contain more protons than ions

• Atoms are larger than ions

• Atoms are electrically neutral, ions have a charge

• Atoms have a charge, ions do not

What is the charge of an aluminum ion with 10 electrons?

• +3

• -1

• -3

• +1

Which of the following is an ionic compound?

• NaCl

• CO2

• O2

• H2O

What type of compound is formed by nonmetals?

• Ionic

• Covalent

• Alloy

• Metallic

What is the main characteristic of a covalent bond?

• Sharing of electrons

• Gain of electrons

• Transfer of electrons

• Loss of electrons

Which compound is an exception to the general rule of ionic compounds?

• NaCl

• NH4Cl

• H2O

• CO2

Which of the following is a covalent compound?

• CO

• CaO

• NaCl

• MgCl2