Properties of Alkali Metals - Group 1
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Questions and Answers

Which of the following elements is not a member of the alkali metals group?

  • Potassium
  • Calcium (correct)
  • Sodium
  • Lithium

What characteristic of alkali metals causes them to be stored in inert liquids?

  • High density
  • Low melting points
  • Reactivity with air (correct)
  • High melting points

What description applies to alkali metals concerning their physical properties?

  • Hard and brittle
  • Malleable and ductile (correct)
  • Soft and heavy
  • High density and high melting points

The primary way alkali metals react with water is by releasing which gas?

<p>Hydrogen (B)</p> Signup and view all the answers

Which property demonstrates that alkali metals are strong reducing agents?

<p>Their ease of losing electrons (B)</p> Signup and view all the answers

Study Notes

Properties of Alkali Metals - Group 1

  • Group 1 elements include Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), and Francium (Fr).
  • They have a univalent nature, readily forming +1 ions by losing one electron from each atom.
  • Alkali metals are characterized by their strong electropositivity, which allows them to easily lose electrons and form positive ions.
  • Highly reactive, these metals are typically found in nature in compounds due to their tendency to react with other elements.
  • Alkali metals tarnish quickly when exposed to air, reacting with oxygen or moisture; they are thus stored in inert substances like paraffin oil.
  • As effective electron donors, they serve as powerful reducing agents and exhibit excellent thermal and electrical conductivity.
  • These metals are malleable and ductile, allowing them to be shaped and drawn into wires.
  • Alkali metals are soft with relatively low melting points and densities compared to many other metals.
  • They react vigorously with cold water, producing hydrogen gas and forming hydroxides, a characteristic property of this group.

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Description

This quiz covers the essential properties of alkali metals, focusing on Group 1 elements such as Lithium, Sodium, and Potassium. You will learn about their reactivity, ion formation, and unique characteristics. Test your knowledge and understanding of these fascinating metals!

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