Unit 2: Properties of Group 1 Materials
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Questions and Answers

Alkali metals are ______, soft and not very dense.

silvery

A metal in the same ______ as Magnesium is Calcium.

group

The ______ objective is to articulate the properties and trends in group 1 elements.

learning

Alkali metals can easily be cut with a ______ knife.

<p>butter</p> Signup and view all the answers

Group 1 elements are also known as __________ metals.

<p>alkali</p> Signup and view all the answers

Group 1 elements have __________ electron(s) in their outer shell.

<p>one</p> Signup and view all the answers

As you go down group 1, the melting and __________ points decrease.

<p>boiling</p> Signup and view all the answers

Non-metals are found on the __________ side of the Periodic Table.

<p>right</p> Signup and view all the answers

Alkali metals share similar properties due to their __________ configuration.

<p>electron</p> Signup and view all the answers

Alkali metals belong to ______ group in the periodic table.

<p>Group 1</p> Signup and view all the answers

The ______ points of group 1 metals tend to decrease down the group.

<p>melting</p> Signup and view all the answers

Group 1 elements are highly reactive and are therefore stored in ______.

<p>oil</p> Signup and view all the answers

To evaluate the trends in group 1 elements, one must ______ their properties.

<p>articulate</p> Signup and view all the answers

The process by which students assess their understanding is called ______-Assessment.

<p>Self</p> Signup and view all the answers

In the lesson, students will ______ the properties and trends of group 1 elements.

<p>explore</p> Signup and view all the answers

The procedure of detailing the findings after exploration is known as ______.

<p>Elaboration</p> Signup and view all the answers

Students will ______ data on the boiling and melting points to see trends.

<p>evaluate</p> Signup and view all the answers

The topic of the lesson is trends in Group ______ elements.

<p>1</p> Signup and view all the answers

Lithium is used for making alloys, especially with ______ to create light and strong aircraft parts.

<p>aluminium</p> Signup and view all the answers

Sodium is used to produce ______ chloride gas, which is important in various chemical processes.

<p>hydrogen</p> Signup and view all the answers

Sodium vapor lamps are used in street lighting, emitting a characteristic ______ light.

<p>yellow</p> Signup and view all the answers

The size of the atoms in Group 1 ______ as you go down the group.

<p>increases</p> Signup and view all the answers

Sodium wire is coated with plastics to exclude ______.

<p>moisture</p> Signup and view all the answers

Sodium cyanide is used in the extraction of ______ and gold.

<p>silver</p> Signup and view all the answers

The process of evaluating the properties of Group 1 elements is part of the lesson's learning ______.

<p>objective</p> Signup and view all the answers

Flashcards

Group 1 elements

Elements in the first column of the periodic table, known as alkali metals.

Alkali metals properties

Silvery, soft, and not very dense; can be cut with a butter knife.

Reactivity of Group 1

They are very reactive, meaning they readily undergo chemical reactions.

Trends in Group 1

Systematic changes in properties of elements as you move down the group.

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Learning objective

Learning to explain the characteristics and patterns of Group 1 elements

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Why are Group 1 elements similar?

Group 1 elements have similar properties because they all have one electron in their outer shell.

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Electrons in Group 1 outer shell?

Group 1 elements have one electron in their outermost electron shell.

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Two properties of Alkali Metals?

Alkali metals are highly reactive and have low melting points.

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Location of non-metals on periodic table?

Non-metals are located on the right side of the periodic table.

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Melting/Boiling point trend in Group 1?

Melting and boiling points decrease as you move down Group 1.

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Alkali Metals

Group 1 elements (e.g., Lithium, Sodium)

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Melting and Boiling Points

Temperatures at which a substance melts or boils.

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Storing Alkali Metals

Why alkali metals are kept in oil to prevent reaction with air or water

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Periodic Table

Table organizing chemical elements by atomic number and properties

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Task 1

Explain why alkali metals are stored in oil.

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Task 2

Describe the trend in melting and boiling points of Group 1 elements.

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What makes Group 1 elements special?

Group 1 elements are very reactive, meaning they readily participate in chemical reactions. This is because they have one loosely held electron in their outermost shell.

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Atomic Size Trend

As you move down Group 1, the atomic size increases. This happens because additional electron shells are added, making the atoms larger.

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Reactivity Trend

Reactivity increases as you move down Group 1. This is due to the increased distance of the outermost electron from the nucleus, making it easier to lose and form bonds.

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Lithium's Role

Lithium is used in making alloys, especially with aluminium. These alloys find applications in aircraft parts due to their lightweight and strength.

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Sodium's Diverse Applications

Sodium has numerous applications, including seasoning food, producing hydrogen chloride, and in soap production.

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Sodium's Uses in Advanced Technology

Molten sodium is used as a coolant in nuclear reactors. Sodium wire, coated with plastics, finds specific uses in electrical circuits due to its unique properties.

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Sodium's Signature Light

Sodium vapor lamps, used for street lighting, produce a characteristic yellow light due to sodium's emission.

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Study Notes

Unit 2: Properties of Materials

  • Unit focuses on the properties of materials, specifically those in Group 1 of the periodic table.

Previous Knowledge

  • Students should already be familiar with the periodic table of elements.
  • Key elements, including Magnesium, are mentioned for further study.

Group 1 of the Periodic Table

  • Group 1 elements are called alkali metals.
  • Hydrogen is the lightest element with an atomic number of 1.
  • Alkali metals include Lithium, Sodium, Potassium, Rubidium, Cesium, and Francium.
  • Alkali metals are silvery, soft, and not very dense, easily cut with a butter knife.
  • Properties of group 1 elements (e.g., melting/boiling points) change as you go down the group.
  • Melting and boiling points decrease as you move down the group.

Electronic Structure of Group 1 elements

  • Lithium, sodium, and potassium atoms are shown in relation to their electronic structure, going down the group
  • Describes increasing distance between the nucleus and outer shell electrons.

Properties of Group 1 Elements in a Table

  • Provides atomic number, mass number, melting point, and boiling point of Lithium, Sodium, and Potassium.
  • Each element's key measurements are tabulated.

Real-Life Applications of Alkali Metals

  • Lithium is used in alloys for light aircraft parts.
  • Sodium chloride is used in food and other products.
  • Molten sodium is a coolant in nuclear reactors.
  • Sodium wire is used in electrical circuits, often coated with plastic to prevent moisture.
  • Sodium vapor lamps use sodium emission to provide yellow light for streetlights.

Plenary Questions

  • Discussion on how atomic size changes as you move down Group 1.
  • Discussion about why the group of metals are considered alkali metals.

Home Learning

  • Students should research the applications of alkali metals.

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Description

This quiz covers the properties of materials focusing on Group 1 of the periodic table, known as alkali metals. Students will explore key elements such as Lithium, Sodium, and examine trends like melting and boiling points. A solid understanding of the periodic table is essential for this assessment.

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