Alkali Metals - Reactivity with Water

The video explores the reactivity of Group 1 elements with water, highlighting how reactivity increases down the group. Lithium reacts with water, releasing hydrogen and fizzing. Sodium's reaction generates enough heat to melt it. Potassium's reaction ignites the gas produced. The video speculates on rubidium's reaction and demonstrates cesium's intense reactivity, emphasizing the trend of increasing reactivity from lithium to cesium.

What is released when lithium reacts with water?

• Nitrogen

• Carbon Dioxide

• Hydrogen

• Oxygen

What happens to sodium when it reacts with water?

• It dissolves completely

• It remains unchanged

• It melts due to the heat produced

• It turns into a gas

Which element's reaction with water is vigorous enough to ignite the gas produced?

• Rubidium

• Lithium

• Potassium

• Sodium

As we move down Group 1, how does the reactivity of the elements change?

• Reactivity decreases

• Reactivity remains the same

• Reactivity increases

• Reactivity fluctuates

Which element is described as extremely reactive in the final section?

• Sodium

• Cesium

• Lithium

• Potassium