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Alkali Metals and Their Reactions

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Questions and Answers

What is produced when group 1 metals react with water?

Carbon dioxide and a metal hydroxide

Oxygen gas and water vapor

Nitrogen gas and a metal oxide

Hydrogen gas and a metal hydroxide (correct)

Why are group 1 metals stored in oil?

To prevent them from rusting

To enhance their conductivity

To prevent them from reacting with oxygen and water vapor (correct)

To increase their reactivity

How does the reactivity of group 1 metals change as you move down the group?

Reactivity increases due to more protons

Reactivity increases as the outer electron is farther from the nucleus (correct)

Reactivity remains constant throughout the group

Reactivity decreases as the outer electron is harder to lose

What property defines alkali metals?

<p>They form alkali solutions in water</p> Signup and view all the answers

What gas is produced during the reaction of group 1 metals with water?

<p>Hydrogen</p> Signup and view all the answers

Study Notes

Alkali Metal Reactions

Alkali metals (lithium, sodium, potassium) react strongly with water.
The reaction produces hydrogen gas bubbles.
A metal hydroxide is also formed (strong alkali).
Alkali metals are stored in oil to prevent reaction with oxygen and water vapor.

Reactivity Trends

Reactivity of group 1 metals increases down the group.
This is because there are more electron energy levels (shells).
Alkali metals are named this way because they form an alkali solution in water.

Reactivity Explanation

Atoms become larger as you move down the group.
The outer electron is farther from the nucleus.
This makes it easier for the outer electron to be lost.
This increased ease of loss leads to greater reactivity.

Reaction Product

The product of the reaction with water is hydrogen gas.

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Description

Explore the fascinating world of alkali metals and their strong reactions with water. This quiz covers the reactivity trends, explanation of reactions, and the products formed, including hydrogen gas. Understand why these metals are stored in oil and the significance of their alkali solutions.