Podcast
Questions and Answers
What are the two groups that belong to the s-block of the Periodic Table?
What are the two groups that belong to the s-block of the Periodic Table?
Group 1 and Group 2
Which of the following elements is NOT an alkali metal?
Which of the following elements is NOT an alkali metal?
Alkali metals form acidic solutions when they react with water.
Alkali metals form acidic solutions when they react with water.
False
Name the elements of Group 1 of the Periodic Table.
Name the elements of Group 1 of the Periodic Table.
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What are the alkaline earth metals?
What are the alkaline earth metals?
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Francium has a half-life of only ____ minutes.
Francium has a half-life of only ____ minutes.
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What is the general electronic configuration of alkali metals?
What is the general electronic configuration of alkali metals?
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Which alkaline earth metals rank fifth and sixth in abundance in the Earth's crust?
Which alkaline earth metals rank fifth and sixth in abundance in the Earth's crust?
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Study Notes
s-Block Elements Overview
- s-Block elements are in Groups 1 and 2 of the Periodic Table, where the last electron is added to the outermost s-orbital.
- The s-orbital can hold a maximum of two electrons, resulting in two distinct groups.
Alkali Metals (Group 1)
- Alkali metals: lithium, sodium, potassium, rubidium, caesium, francium.
- Known for forming hydroxides that are strongly alkaline when reacting with water.
- Sodium and potassium are abundant; lithium, rubidium, and caesium are less common.
- Francium is highly radioactive with a half-life of 21 minutes for its longest-lived isotope.
Alkaline Earth Metals (Group 2)
- Alkaline earth metals: beryllium, magnesium, calcium, strontium, barium, radium.
- Except for beryllium, these metals are referred to for their alkaline oxides and hydroxides.
- Calcium and magnesium are among the most abundant in the Earth's crust, ranking fifth and sixth respectively.
- Strontium and barium are less abundant, while beryllium is rare and radium is the rarest at only 0.010% of igneous rocks.
General Traits and Properties
- General electronic configuration for alkali metals: [noble gas] ns¹.
- General electronic configuration for alkaline earth metals: [noble gas] ns².
- Biological significance includes sodium, potassium, magnesium, and calcium.
Industrial Relevance
- Industrially significant compounds include Portland cement, among others formed from these metals.
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Description
This quiz covers the essential concepts of s-block elements in chemistry, focusing on their properties, trends, and reactivity. Understanding these key elements is crucial for grasping the periodic table's organization. Prepare to test your knowledge of this important unit!
