Alkaline Earth Metals - PowerPoint PPT Presentation

1 / 9
About This Presentation
Title:

Alkaline Earth Metals

Description:

Beryllium. Beryllium is a toxic bivalent element, steel gray, strong, light-weight, ... Beryllium has one of the highest melting points of the light metals. ... – PowerPoint PPT presentation

Number of Views:3746
Avg rating:3.0/5.0
Slides: 10
Provided by: janislynn
Category:

less

Transcript and Presenter's Notes

Title: Alkaline Earth Metals


1
Alkaline Earth Metals
  • Group IIA

2
  • The alkaline earth metals are a series of
    elements comprising group 2 of the periodic
    table beryllium (Be), magnesium (Mg), calcium
    (Ca), strontium (Sr), barium (Ba) and radium
    (Ra).
  • The alkaline earth metals are silvery colored,
    soft, low-density metals, which react readily
    with halogens to form ionic salts, and with
    water, though not as rapidly as the alkali
    metals, to form strongly alkaline hydroxides

3
Beryllium
  • Beryllium is a toxic bivalent element, steel
    gray, strong, light-weight, primarily used as
    hardening agent in alloys. Beryllium has one of
    the highest melting points of the light metals.
    It has excellent thermal conductivity, is
    nonmagnetic, it resists attack by concentrated
    nitric acid and at standard temperature and
    pressures beryllium resist oxidation when exposts
    to air.

4
Magnesium
  • Chemical element, metallic, symbol Mg, atomic
    number 12, atomic weight 24,312. Magnesium is
    silvery white and very light. Magnesium is very
    chemically active, it takes the place of hydrogen
    in boiling water and a great number of metals can
    be produced by thermal reduction of its salts and
    oxidized forms with magnesium. Magnesium is the
    eighth most abundant element and constitutes
    about 2 at the Earth's crust

5
Calcium
  • The chemical element Calcium (Ca), atomic number
    20, is the fifth element and the third most
    abundant metal in the earths crust. Calcium ions
    solved in water form deposits in pipes and
    boilers and when the water is hard, that is, when
    it contains too much calcium or magnesium.

6
Strontium
  • Strontium is a soft, silver-yellow,
    alkaline-earth metal. It has three allotropic
    crystalline forms. Strontium reacts vigorously
    with water and tarnishes in air, so it must be
    stored out of contact with air and water. Due to
    its extreme reactivity to air, this element
    always naturally occurs combined with other
    elements and compounds. Finely powdered strontium
    metal will ignite in air to produce both
    strontium oxide and strontium nitride.

7
Barium
  • Barium is a silvery-white metal that can be found
    in the environment, where it exists naturally. It
    is very light and its density is half that of
    iron. Barium oxidizes in air, reacts vigorously
    with water to form the hydroxide, liberating
    hydrogen. Barium reacts with almost all the
    non-metals, forming often poisonous compounds.

8
Radium
  • Radium is silvery, lustrous, soft, intensely
    radioactive. It oxidizes with exposure to air,
    turning from pure white to black. Radium is
    luminescent, corrodes in water to form radium
    hydroxide. Although is the heaviest member of the
    alkaline-earth group it is the most volatile.

9
  • alkaline earth metals
Write a Comment
User Comments (0)
About PowerShow.com