Which of the following is an example of alkali metal?
Show answer & explanation
Correct answer: D
Explanation
Correct Answer:
Option 4 (Potassium)
Explanation:
Potassium (K) is an element in Group 1 of the Periodic Table, known as the alkali metals. Other members of this group include lithium (Li), sodium (Na), rubidium (Rb), cesium (Cs), and francium (Fr). These metals are highly reactive and do not occur in the free state in nature.
Additional Facts:
Characteristics: Alkali metals are very soft (they can be cut with a knife) and have low melting points.
Manganese: This is a transition metal.
Silver and gold: These are also transition metals and are called coinage metals.
Reactivity: Sodium and potassium are kept immersed in kerosene because of their rapid reactivity with air and water.
Possible questions for upcoming exams:
Which is the most well-known metal that can be cut with a knife? (Answer: Sodium)
Which group do the alkaline earth metals belong to? (Answer: Group 2)
What is the chemical symbol for potassium? (Answer: K - derived from calcium)