4.3.2 Oxides of Period 3 Elements

• What is the first element in Period 3 of the periodic table?

  Sodium
• Argon is a Period 3 element.
• An oxide is a chemical compound that contains at least one oxygen
• Oxides can only be solids at room temperature.

  False
• What is the chemical formula of sodium oxide?

  $Na_{2}O$
• Magnesium oxide has a bonding type that is ionic
• Which Period 3 oxide is amphoteric?

  Al_{2}O_{3}</latex>
• Phosphorus(V) oxide is formed by burning phosphorus in oxygen.
• What is the chemical formula of sulfur dioxide?

  $SO_{2}$
• Dichlorine heptoxide is formed by the dehydration of perchloric acid
• The Period 3 elements are arranged in order of increasing atomic number.
• Which Period 3 element is represented by the chemical symbol Na?

  Sodium
• The Period 3 element with the chemical symbol Al is aluminium
• What is the chemical symbol of phosphorus?

  P
• Sulfur is a Period 3 element.
• What is the last Period 3 element?

  Argon
• What are the properties of magnesium oxide when formed by burning magnesium in oxygen?

  Ionic, Basic
• The chemical formula for aluminium oxide is Al_{2}O_{3}
• Sodium oxide is formed by heating sodium in oxygen and is ionic and basic.
• What type of oxide is aluminium oxide?

  Amphoteric
• Silicon dioxide is formed by burning silicon in oxygen and is covalent and acidic
• Dichlorine heptoxide is formed by dehydrating perchloric acid and is acidic.
• Match the Period 3 element with its corresponding oxide formula:

  Sodium ↔️ Na_{2}O

  Magnesium ↔️ MgO

  Aluminium ↔️ Al_{2}O_{3}

  Silicon ↔️ SiO_{2}
• An oxide is a chemical compound that contains at least one oxygen atom bonded to another element
• General properties of oxides include physical state, solubility in water, bonding type, and acidity/basicity.
• Arrange the Period 3 elements in order of increasing acidity of their oxides:

  1️⃣ Sodium

  2️⃣ Magnesium

  3️⃣ Aluminium

  4️⃣ Silicon

  5️⃣ Phosphorus

  6️⃣ Sulfur

  7️⃣ Chlorine
• Which Period 3 oxide is amphoteric?

  Aluminium oxide
• Match the Period 3 oxide with its acidity/basicity:

  Sodium oxide ↔️ Basic

  Silicon dioxide ↔️ Acidic

  Aluminium oxide ↔️ Amphoteric
• The acidity and basicity of Period 3 oxides increase from left to right
• Sodium oxide is basic due to its ionic bonding.
• Which Period 3 oxide is amphoteric?

  Aluminium oxide
• The acidity and basicity of Period 3 oxides vary across the period
• Oxides of elements on the left side of Period 3 tend to be acidic.

  False
• What is the formula for sodium oxide?

  $Na_{2}O$
• Magnesium oxide has the formula MgO</latex>
• Aluminium oxide is an acidic oxide.

  False
• What is the formula for silicon dioxide?

  $SiO_{2}$
• Phosphorus forms the oxide $P_{4}O_{10}$
• Sulfur dioxide is an acidic oxide.
• What is the formula for chlorine oxide?

  $Cl_{2}O_{7}$