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Chemistry Project - Group 2

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Chantelle B

on 5 October 2012

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Transcript of Chemistry Project - Group 2

Alkaline-Earth Metals Presented By:

-Jaurdyn Gilliss

-Emily Davison

<3 Becca Daugherty

- Chantelle Beeter GROUP 2 Characteristics Beryllium - Do not occur naturally as free elements

- occur most commonly as the carbonates, phosphates, silicates, and sulfates

- occur naturally as compounds that are either insoluble or slightly soluble in water

- Usually form ionic compounds

- two valence electrons REFRENCES:

Rastogi, S. C., & Pritzl, G. G. (1998). Red Lipstick: A Source of Barium to Humans and the Environment. Bulletin Of Environmental Contamination & Toxicology, 60(4), 507-510.
Alkaline-earth metal. (2009). American Heritage Student Science Dictionary, 9.
. Beryllium Strontium Magnesium Calcium Barium Radium Uses Magnesium is used in flares. Fireworks: Barium is the green sparks.
Strontium is the red sparks. The Body:
Calcium found in bones and teeth.
Magnesium helps absorb the calcium. Magnesium is used in tracer bullets. Barium is used in X-Rays. Magnesium is found in chlorophyll, the greenish pigment in plants. Cautions Beryllium is a known human carcinogen. Calcium reacts violently with water; producing hydrogen gas. Properties -Readily lose their valence electrons to form cations. - good heat and electrical conductors -Reactive, but less reactive than alkali metals -High melting point -High boiling point - ductile & malleable - low electronegativty. Barium is used as a colorant in red lipsticks and cosmetics Sarquis, M., & Sarquis, J. L. (Eds.). (2012). Modern Chemistry. Orlando, FL: Houghton Mifflin Harcourt. - react with nonmetals, in particular halogens. Barium powder can ignite spontaneously in air. alkaline-earth metal. (2012). In Encyclopædia Britannica. is the coolest jk Low electronegativity- Wilkison, K. (2005). The periodic table. Retrieved from http://www.hobart.k12.in.us/ksms/PeriodicTable/calcium.htm
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