Learning Path
Question & Answer1
Understand Question2
Review Options3
Learn Explanation4
Explore TopicChoose the Best Answer
A
Potassium is a gas at room temperature.
B
Potassium reacts vigorously with water to produce potassium hydroxide and hydrogen gas.
C
Potassium has a higher melting point than sodium.
D
Potassium is less reactive than lithium.
Understanding the Answer
Let's break down why this is correct
Answer
Potassium is a very soft, silvery metal that is highly reactive, especially with water. When it touches water it reacts vigorously, producing hydrogen gas and a strong alkaline solution. Because it has only one valence electron, it easily loses that electron to form a +1 ion, giving it the same chemical behavior as other alkali metals. For example, a small piece of potassium dropped into a glass of water splashes and fizzles as hydrogen bubbles appear. This reactivity and tendency to form K⁺ ions are the defining features of potassium.
Detailed Explanation
Potassium is a soft, silver‑grey metal that reacts very fast when it touches water. Other options are incorrect because Many people think metals can be gases because they hear the word "metal." In reality, potassium is a solid at room temperature, like most metals; A common mistake is that heavier elements always melt at higher temperatures.
Key Concepts
Group 1 elements
potassium (K)
Topic
Alkali Metals
Difficulty
medium level question
Cognitive Level
understand
Practice Similar Questions
Test your understanding with related questions
1
Question 1Which of the following statements is true regarding rubidium (Rb), an alkali metal?
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2
Question 2Which chemical property of potassium (K) distinguishes it from other alkali metals?
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3
Question 3Which of the following statements accurately describe the properties and behaviors of alkali metals? Select all that apply.
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4
Question 4Which of the following statements is true regarding rubidium (Rb), an alkali metal?
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5
Question 5Which chemical property of potassium (K) distinguishes it from other alkali metals?
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6
Question 6Which of the following statements correctly describes the properties of potassium (K), an alkali metal in Group 1 of the periodic table?
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7
Question 7Which of the following statements accurately describe the properties and behaviors of alkali metals? Select all that apply.
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