Reactivity Series: Comparing the Reactivity of Group 1 and Group 2 Metals

The video tutorial explores the reactivity of four metals: sodium, potassium, magnesium, and calcium. It demonstrates experiments to compare their reactivity using water and hydrochloric acid. The tutorial explains atomic structure, focusing on electron shells and metallic bonds, and discusses reactivity trends in the periodic table. It highlights that Group 1 metals are more reactive than Group 2 metals, and reactivity increases down the groups. Practical applications of reactivity, such as tin electroplating in food cans, are also covered.

What materials are needed to compare the reactivity of the four metals?

• Sodium, potassium, magnesium, calcium, water, and hydrochloric acid

• Sodium, potassium, zinc, copper, water, and sulfuric acid

• Sodium, lithium, magnesium, calcium, water, and nitric acid

• Sodium, potassium, magnesium, calcium, water, and sulfuric acid

Which group do sodium and potassium belong to in the periodic table?

• Group 4

• Group 3

• Group 2

• Group 1

What is observed when potassium reacts with water?

• A vigorous reaction

• No reaction

• A mild reaction

• A slow reaction

Why do Group 2 metals react more vigorously with hydrochloric acid than with water?

• Because Group 2 metals are more reactive with water

• Because hydrochloric acid is less reactive

• Because water is a stronger reagent

• Because hydrochloric acid contains free moving ions

What happens when magnesium is added to hydrochloric acid?

• A reaction takes place

• The metal dissolves slowly

• The metal remains unchanged

• No reaction occurs

What is the main reason Group 1 metals are more reactive than Group 2 metals?

• They have a smaller atomic size

• They have more electrons in their outer shell

• They have a larger atomic size

• They have fewer electrons in their outer shell

Why are potassium atoms more reactive than sodium atoms?

• Potassium atoms have fewer electrons

• Potassium atoms are smaller, making their bonds stronger

• Potassium atoms have more electrons

• Potassium atoms are larger, making their bonds weaker

Which metal is the most reactive among the four tested?

• Sodium

• Magnesium

• Calcium

• Potassium

What is a practical application of the unreactive nature of tin?

• Manufacture of food cans

• Construction of bridges

• Making jewelry

• Producing batteries

How are food cans protected from reacting with the acid in food?

• They are coated with zinc

• They are electroplated with tin

• They are made of plastic

• They are lined with copper