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ALKALI METALS - PowerPoint PPT Presentation


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ALKALI METALS. Group one (EXCEPT HYDROGEN) on the Periodic Table are Alkali Metals.

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ALKALI METALS

  • Group one (EXCEPT HYDROGEN) on the Periodic Table are Alkali Metals.
  • These metals are so reactive that they are never found by themselves in nature. They are always found as part of a compound. For this reason, sodium must be kept in oil solutions in the laboratories to prevent a chemical reaction.
  • As with all metals, the alkali metals are malleable, ductile, and good conductors of heat and electricity. The alkali metals are softer than most other metals. Cesium and francium are the most reactive elements in this group. Alkali metals can explode if they are exposed to water.

Sodium is an Alkali Metal

  • INSTRUCTIONS
  • Label GROUP 1 in your Periodic Table (your best friend!) as ALKALI METALS.
  • List all 6 elements in group 1 (not including hydrogen) in the boxes provided in your packet. Read the excerpt above about Alkali metals and answer the related questions in your packet.
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Alkaline Earth Metals

Alkaline Earth Metals are similar to Alkali Metals in their high level of reactivity. Alkaline metals are sometimes shiny and have high melting points.

Alkaline Earth Metals are most known for their ability to withstand high heat in fires, such as the “fires” of the earth’s core.

This group is also well-known for its presence in living organisms. Calcium and Magnesium are both essential to human life. Strontium is essential to marine life and while Radium is radioactive, it is also toxic.

Beryllium is an Akaline Earth Metal

INSTRUCTIONS

Based on the elements mentioned in the reading, which group is considered the Alkaline Earth group?List all the elements in the Alkaline Earth group in the boxes provided in your packet.

Read the excerpt above about Alkaline earth metals and answer the related questions in your packet.

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Halogens

All Halogens are categorized as nonmetals. Halogens are highlyreactive, and by themselves they can be harmful or deadly tohumans or organisms. They frequently combine with alkali metals to make salts (NaCl = table salt).

These elements can be in various states of matter. For example, two of the halogens are gases at room temperature, one is a liquid at room temperature, and others can be solids at room temperature.

  • INSTRUCTIONS
  • Based on the electron configurations on your desk, find out which elements are considered halogens.
  • List all the elements you find in the boxes provided in your packet.
  • Read the excerpt above about Halogens and answer the related questions in your packet.
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Noble Gases

All Noble Gases are colorless, odorless gases that are nonreactive.

Since Noble Gases don’t react with other elements, they do not form compounds except in very specific lab conditions.

The boiling point and melting point of Noble Gases are very close together, so Noble Gases are only liquids within a 10 degree range. They have a very low melting point and boiling point, so they are almost always in gas form.

Noble Gases have many industrial uses due to their safe nature. Because they don’t react with anything and are very stable, they are very useful. For example, krypton is used in many high powered gas lasers.

Noble Gas discharge tubes.

  • INSTRUCTIONS
  • Using the Bohr models at your table, figure out which elements are noble gases. List these elements in the boxes provided in your packet.
  • Read the excerpt above about Noble Gases and answer the related questions in your packet.
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Transition Metals

Transition metals are those in groups 3-12 on the periodic table. These elements are in the D-block of the periodic table.

Transition metals generally have high conductivity and are quite malleable as well. Like other metals on the periodic table, transition metals are shiny and have high melting and boiling points.

The transition metal gold is believed to be one of the first metals discovered. In fact, chemists in the Medieval age tried to turn other metals into gold (also known as alchemy).

Gold blocks

  • INSTRUCTIONS
  • Label Groups 3-12 with penin your personal Periodic Table as Transition metals
  • Read the excerpt above about Transition metals and answer the related questions in your packet.