1.10 Group 1

• Group 1 elements have one valence electron.


  True
• How many valence electrons do Group 1 elements have?

  One
• Group 1 elements are soft and silvery-white in appearance.
• Group 1 elements react with water to produce hydrogen gas and a basic solution.
• Group 1 elements readily lose one valence electron to form positive ions.


  True
• Order the Group 1 elements from least reactive to most reactive:

  1️⃣ Lithium

  2️⃣ Sodium

  3️⃣ Potassium

  4️⃣ Rubidium

  5️⃣ Caesium
• Group 1 elements react with oxygen to form oxides or peroxides.


  True
• What two substances do Group 1 elements react with?

  Water and oxygen
• What is another name for Group 1 elements?

  Alkali metals
• Group 1 elements are very reactive due to their single valence electron
• Group 1 elements have low melting and boiling points.

  True
• Group 1 elements readily lose their one valence electron to form positive ions
• Why does the reactivity of Group 1 elements increase down the group?

  Outer electron is further
• What gas is produced when Group 1 elements react with water?

  Hydrogen gas
• What is lithium used in?

  Rechargeable batteries
• Potassium is used in fertilizers and fireworks.


  True
• What is another name for Group 1 elements?

  Alkali Metals
• Group 1 elements are located in the first column of the periodic table.
• Match the characteristic with its description for Group 1 elements:

  Number of Valence Electrons ↔️ One

  Reactivity ↔️ Very Reactive

  Location on Periodic Table ↔️ First Column

  Common Name ↔️ Alkali Metals
• Group 1 elements have low melting and boiling points.


  True
• What is the trend in reactivity as you move down Group 1?

  Increases
• Which Group 1 element is the least reactive?

  Lithium
• What gas is produced when Group 1 elements react with water?

  Hydrogen
• Match the reaction with its products for Group 1 elements:

  With Water ↔️ Hydrogen gas, Alkaline hydroxide

  With Oxygen ↔️ Oxides or Peroxides
• Group 1 elements react with oxygen to form oxides or peroxides
• Group 1 elements are located in the first column of the periodic table.


  True
• How many valence electrons do Group 1 elements have?

  One
• What color are Group 1 elements in appearance?

  Silvery-white
• What is the density of Group 1 elements?

  Low density
• Arrange the following Group 1 elements in order of increasing reactivity:

  1️⃣ Lithium

  2️⃣ Sodium

  3️⃣ Potassium

  4️⃣ Rubidium

  5️⃣ Caesium
• Lithium is the least reactive element in Group 1.


  True
• Caesium is the most reactive element in Group 1
• Match the Group 1 reaction with its conditions:

  Reaction with Water ↔️ Room temperature

  Reaction with Oxygen ↔️ Room temperature or heat
• Sodium is used in street lamps and soap manufacturing