1.10 Group 1

• Group 1 metals are very hard.

  False
• Group 1 metals are silver-white, shiny, and very soft.
• The reactivity of Group 1 metals increases as you move down the group.
• Group 1 metals have low melting and boiling points.
• The melting and boiling points of Group 1 metals decrease as you move down the group.
• Why does the reactivity of Group 1 metals with water increase down the group?

  Decreasing metal-electron bond strength
• What is another name for Group 1 metals?

  Alkali Metals
• What are the melting and boiling points of Group 1 metals like?

  Low
• The reactivity of Group 1 metals decreases as you move down the group.

  False
• What causes the decrease in melting and boiling points of Group 1 metals down the group?

  Weaker intermolecular forces
• Potassium reacts more explosively with halogens than sodium.


  True
• Match the Group 1 element with its reaction with water:

  Lithium ↔️ Reacts slowly

  Sodium ↔️ Reacts vigorously

  Potassium ↔️ Reacts explosively
• Order the Group 1 metals from least to most reactive with halogens:

  1️⃣ Lithium

  2️⃣ Sodium

  3️⃣ Potassium
• Match the Group 1 metal with its reaction with halogens:

  Lithium ↔️ Moderately

  Sodium ↔️ Vigorously

  Potassium ↔️ Explosively
• Potassium hydroxide is used in soaps and detergents.


  True
• Group 1 metals are located in the first column of the periodic table, excluding hydrogen.


  True
• The reactivity of Group 1 metals decreases as you move down the group.

  False
• Match the Group 1 metal with its electronic configuration:

  Lithium ↔️ 2, 1

  Sodium ↔️ 2, 8, 1

  Potassium ↔️ 2, 8, 8, 1
• The atomic radius of Group 1 metals increases as you move down the group
• Group 1 metals are also known as Alkali metals.
• The reactivity of Group 1 metals increases as you move down the group.


  True
• The outer electron in Group 1 metals is responsible for their high reactivity.

  True
• The outer electron in Group 1 metals is more strongly held by the nucleus as you move down the group.

  False
• Arrange the following Group 1 elements in order of increasing atomic radius:

  1️⃣ Lithium (Li)

  2️⃣ Sodium (Na)

  3️⃣ Potassium (K)
• Lithium reacts with water to form lithium hydroxide and hydrogen gas.


  True
• The products of Group 1 metals reacting with water become more alkaline as you move down the group.


  True
• Group 1 metals have low density.

  True
• Match the Group 1 metal with its electronic configuration:

  Lithium (Li) ↔️ 2, 1

  Sodium (Na) ↔️ 2, 8, 1

  Potassium (K) ↔️ 2, 8, 8, 1
• Arrange the Group 1 metals in order of increasing atomic radius:

  1️⃣ Lithium (Li)

  2️⃣ Sodium (Na)

  3️⃣ Potassium (K)
• What are the products of lithium reacting with water?

  Lithium hydroxide and hydrogen gas
• The decreasing strength of the metal-electron bond makes it easier for Group 1 metals to lose their outer electron
• What type of compounds do Group 1 metals form when reacting with halogens?

  Ionic compounds
• The reactivity of Group 1 metals with halogens increases as you move down the group.


  True
• Sodium is used in street lighting and heat transfer
• What are Group 1 metals commonly known as?

  Alkali metals
• What is the hardness of Group 1 metals?

  Very soft
• The electronic configuration of lithium is 2, 1
• What factor makes the outer electron easier to remove in Group 1 metals as you move down the group?

  Decreasing strength of the nucleus
• Match the Group 1 metal with its atomic radius in picometers:

  Lithium ↔️ 167

  Sodium ↔️ 190

  Potassium ↔️ 243
• Order the Group 1 metals from highest to lowest melting point:

  1️⃣ Lithium

  2️⃣ Sodium

  3️⃣ Potassium