Elementx

kitefleaΠολεοδομικά Έργα

15 Νοε 2013 (πριν από 3 χρόνια και 6 μήνες)

69 εμφανίσεις

Want to have some fun!?

Want to make your voice sound funny? Suck in some helium and
say a funny phrase! Your friends will die laughing and want to join
the fun!

WARNING: Inhalation of Helium kills brain cells!

Ever thought about how much you have
probably polluted the air? Well here is your
chance to change all that and become eco
friendly. A Helium balloon is now biodegradable
and it making a positive effect on cleaning
Earth’s air and ground.

-
filling party balloons


it’s a safe, non
-
flammable gas

-
creation of an inert gas shield for arc welding

-
high speed ‘push gas’ inside air
-
to
-
air missiles for guidance
corrections

-
protective gas in growing silicon and germanium crystals, and in
titanium and zirconium production

-
cooling medium for nuclear reactors; helium won't become
radioactive

-
artificial atmospheres for divers and others working under
pressure (mixtures of about 80 percent helium and 20 percent
oxygen)

-
cryogenics and superconductivity

-
use in supersonic wind tunnels

-
pressurizing agent for liquid fuel rockets (inert so it won't react)

-
leak detection agent for extremely small leaks

-
isotopic dating by helium ratios (seawater, ocean beds, etc.)

-
helium cardiopulmonary resuscitation pump (heart surgery)

-
helium filled border patrol "AEROSTAT" monitoring blimps


name : Helium

symbol: He

atomic number: 2

average atomic mass number:
4.002602

number of protons: 2

number of electrons: 2

number of neutrons: 2

group number/name: Group 18

period number: Period 1

phase (state of matter at room
temperature): Gas

crystal structure: Hexagonal

boiling/condensation point;
-
268.6C
°


(4.549994K,
-
451.48 F
°
)///

freezing/melting point:
-
272.0C
°


(1.15K,
-
457.6F
°
)


uses

Lewis Dot Diagram

Crystal structure

If you buy one proton, electron
and neutron!

You will receive double of
everything!


Don’t miss out on this great
opportunity while it last!


Everything comes in two!!!

Bohr Diagram

We accept Credit or Debit!

http://chemicalelements.com/elements/he.html

http://www.corrosionsource.com/PeriodicTable/H
elium

http://chemistry.about.com/od/elementfacts/a/
helium.htm

Information gathered by following:

http://www.blm.gov/nm/st/en/prog/energy/helium
/helium_facts.html