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Science performance task!

Wong En

on 17 August 2014

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Transcript of Sodium!

When sodium comes in contact with oxygen, either one of these happens:
1st Scenario:

Sodium reacts with the oxygen to form sodium hydroxide and sodium carbonate..This causes the surface to tarnish.
4Na + O2 -> 2Na2O (Not much...)
2nd Scenario:
If the sodium and air is burnt, sodium hydroxide and hydrogen gas is formed, which may start a fire or explosion...(Woah!)
History and Discovery
Discovered in 1806 by Mr Humphry Davy in England
Mr Humphry Davy performed electrolysis on caustic soda and discovered it
Came from the word
Soda is sodium carbonate( Na2CO3)!

The symbol Na comes from the Latin word "Natrium"
Uses of sodium
Normal functioning of nerves
Maintaining of blood pressure
Lots of foods use salt(sodium chloride) as a seasoning
Ms Yam's old prezis!

The prezi may be over, but sodium will never be over in your life...
(0.4 per cent of your body's weight is made up of sodium!)
Structure & Properties
12 neutrons
11 protons
11 electrons
Melting Point: 97.72°C
Boiling Point: 883°C
Atomic number: 11
Mass Number:22.989769 ± 0.00000002 u(or round up to 23)
Isotopes: Ranges from 13-40, but only 23Na is stable
Malleable(so weak it can be cut with a knife)
Period Number: 3
Group Number: 1
solid at room temperature
Silver-white in color
Member of the alkali metals
Sodium and Water
Sodium and Air
The sodium crystal floats on the water because density
is 0.97 g/mL.
The sodium crystal "hovers" on the surface because
hydrogen gas is produced, which propels it
around. It turns spherical to reduce its surface
of contact with the water.
The sodium crystal moves faster and faster as in the
reaction, the sodium and solution gains heat.
If it's really hot, the hydrogen gas ignites and starts a fire.
If it's REALLY hot, an explosion occurs!
sodium + water —> sodium hydroxide solution + hydrogen
Sodium is very important in our daily lives!
Found in:
Salt(sodium chloride)
Toothpaste(sodium fluoride)
Wahing soda(sodium carbonate)

Interesting Facts!
So you think you know all about sodium now? Try this quiz!
"High sodium diet linked to early star death!"
Typical fire extinguishers are ineffective on sodium fires and can actually "add fuel to the fire"
Sodium compounds has been used as a form of currency, medical treatments, and trade product for thousands of years. Mostly in salt form.
Shockingly, the word "salary" comes from "salt"!
Did you know that sodium burns with an intense- yellow color? Fires aren't only red and blue!
For that reason, sodium is used in fireworks!
And lots of other pages!
Has three energy levels/shells:

First shell: 2

Second shell:8

Third shell:1
Sodium and the halogens
Halogens are the elements on Group 17 of the periodic
They are fluorine, chlorine, bromine, iodine and astatine
Sodium metal reacts vigorously with all of them to form sodium halides:

2Na(s) + F2(g) → NaF(s)
2Na(s) + Cl2(g) → NaCl(s)
2Na(s) + Br2(g) → NaBr(s)
2Na(s) + I2(g) → NaI(s)
Required Daily Amount!

Amount Required Per Day:
Infant (6-12 months)

Toddler (2-3 years old) 800 mg
Children (4-8 years old) 1200mg
Adolescent (9-18 years old) 1500mg
Adults (18-50 years old) 1500mg
Senior (51-70 years old) 1300mg
(70 + ) 1200mg

(Only found in nature as a combined state/compound)
Refering to the periodic table again,
You may realise that ununseptium is also in Group 17.
However, it is still not confirmed if it is a halogen.
Full transcript