SODIUM AND SILICON

SODIUM

• Group number:1A
• 1s2 2s2 2p6 3s1
• Positive ionic charge
• Lose 1 electron to form an ion

MORE ABOUT SODIUM

• Ionic: 1s2 2s2 2p6
• Solid at 25 degrees Celcius (room temp.)
• Density: 0.971g/cm3
• Na-23: most common ionic form
• Na-23: 100% abundance

SODIUM USES AND COMMON FORMS

• NaCl: table salt
• Naturally occurs: milk, beets, celery
• Excess: high blood pressure, fluid build up
• vapor of sodium: streetlights
• Soft pretzels are coated w/ hyrdoxide: chewy

INTERESTING FACTS

• First isolated by Humphry Davy in 1807
• Named Sodagen first, sodanum: headache remedy
• Produced in heavy stars
• 6th most abundant element on earth
• liquid sodium: sometimes used to cool nuclear reactors

SILICON

• Period: 3
• Group: 14
• Electron configuration: 1s2_2s_2p6_3s2_3p2
• Common ionic charges: none
• State of matter at 25* C (room temperature): solid

DENSITY

• Density: 2.3296 g/cm3

COMMON ISOTOPES

• Common isotopes: top 3 (~24 total):
• 28Si- 92%
• 29Si- 5%
• 30Si- 3%

Common/ important forms of Silicon and it's compounds:
Silicon dioxide (SiO2) is silicones most common compound, also the most abundant compound in the earths crust

Uses in society/ interesting facts:
Silicon carbide (SiC) = used as an abrasive
7th most abundant element in the universe
2nd most abundant element on the planet
~25% of earths crust= silicon
Si= usually found linked with a lair of O molecules
Discovered in 1824 by Jöns Jacob Berzelius