Arrange the metals Potassium, Lithium, Sodium in order of increasing reactivity.

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Study for the IGCSE Edexcel Chemistry Test. Access flashcards and multiple choice questions with hints and explanations. Get ready for your exam!

Multiple Choice

Arrange the metals Potassium, Lithium, Sodium in order of increasing reactivity.

Explanation:
The main idea here is how reactivity changes for alkali metals as you move down the group. As you go from lithium to sodium to potassium, the outer electron is farther from the nucleus and more shielded by inner electrons, so it’s easier to remove. That means reactivity increases down the group. So the order from least to most reactive is lithium, then sodium, then potassium. This trend matches how their reactions with water become progressively more vigorous (lithium reacts slowly, sodium faster, potassium most vigorously).

The main idea here is how reactivity changes for alkali metals as you move down the group. As you go from lithium to sodium to potassium, the outer electron is farther from the nucleus and more shielded by inner electrons, so it’s easier to remove. That means reactivity increases down the group. So the order from least to most reactive is lithium, then sodium, then potassium. This trend matches how their reactions with water become progressively more vigorous (lithium reacts slowly, sodium faster, potassium most vigorously).

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy