chemical changes

• Which metal reacts vigorously with water at room temperature?

  Potassium
• Rank the following metals from most reactive to least reactive based on the reactivity series:

  1️⃣ Potassium

  2️⃣ Calcium

  3️⃣ Zinc

  4️⃣ Iron

  5️⃣ Gold
• Reactive metals react vigorously with water.

  True
• Match the metal with its reactivity:

  Gold ↔️ Least reactive

  Potassium ↔️ Most reactive

  Copper ↔️ Less reactive

  Iron ↔️ Moderately reactive
• Steps to create the reactivity series

  1️⃣ Define the reactivity series

  2️⃣ Identify the most reactive metals

  3️⃣ Describe reactions with water

  4️⃣ Describe reactions with acids

  5️⃣ Compare reactions to order metals

  6️⃣ Create reactivity order based on reactions
• What is the defining characteristic of the most reactive metals?

  They lose electrons easily
• The reactivity of a metal with water depends on its position in the reactivity series.

  True
• What are the products of a reaction between a metal and water?

  Hydrogen gas and metal hydroxide
• What are two examples of highly reactive metals mentioned in the text?

  Potassium and sodium
• Which metal reacts very slowly with steam?

  Iron
• What gas is produced when metals react with acids?

  Hydrogen gas
• What do the most reactive metals readily lose to form positive ions?

  Electrons
• What is the chemical formula for zinc chloride?

  $ZnCl_{2}$
• What is a reactivity series?

  A list of metals
• Understanding the reactivity series helps predict how metals react in chemical reactions.

  True
• Least reactive metals do not readily lose electrons.

  True
• What is the first step in ordering metals by reactivity?

  Define the reactivity series
• The reactivity of a metal determines the speed and intensity of its reaction with water.

  True
• Copper has a high tendency to lose electrons.

  False
• Which metal reacts with hydrochloric acid to produce hydrogen gas and zinc chloride?

  Zinc
• Match the metal with its reaction category:

  Potassium ↔️ Reacts with water

  Zinc ↔️ Reacts with acids

  Copper ↔️ Highly unreactive
• The reactivity of a metal determines the speed and vigor of its reaction with acids.

  True
• Aluminium reacts with water but is less reactive than magnesium.

  True
• What is a reactivity order of metals based on their reactions with water and acids?

  Ranking from most to least reactive
• Metals react with acids to produce hydrogen gas and a salt.

  True
• Gold reacts with water to form a hydroxide.

  False
• Which metals are examples of the most reactive metals?

  Potassium and sodium
• Copper reacts with water to produce hydrogen gas.

  False
• What is the purpose of the reactivity series?

  To rank metal reactivity
• Order the metals from most to least reactive based on the reactivity series:

  1️⃣ Potassium

  2️⃣ Sodium

  3️⃣ Calcium

  4️⃣ Gold
• Order the following metals from most reactive to least reactive with water:

  1️⃣ Potassium

  2️⃣ Sodium

  3️⃣ Calcium

  4️⃣ Magnesium

  5️⃣ Iron

  6️⃣ Copper
• Order the following metals from most to least reactive:

  1️⃣ Potassium

  2️⃣ Calcium

  3️⃣ Magnesium

  4️⃣ Zinc

  5️⃣ Iron

  6️⃣ Lead

  7️⃣ Copper
• Copper is less reactive than iron.

  True
• What is reactivity in metals defined as?

  The ability to react chemically
• Iron reacts slowly with water to produce iron hydroxide and hydrogen gas.

  True
• Hydrogen is included in the reactivity series for comparison purposes.

  True
• Match the reactants with their products in the reaction of zinc with hydrochloric acid:

  Zinc (Zn) ↔️ Zinc chloride (ZnCl_{2})

  Hydrochloric acid (HCl) ↔️ Hydrogen gas (H_{2})
• Which metal is the most reactive in the series and reacts with water?

  Potassium
• Order the metals from most reactive to least reactive with acids:

  1️⃣ Potassium

  2️⃣ Sodium

  3️⃣ Zinc

  4️⃣ Copper
• Metals at the top of the reactivity series react slowly with acids.

  False