This is some information that I've found about my chemicals.

HELIUM

Physical Properties

1. Colorless odorless monatomic gas.

2. Melting point- 272.2 (26 atm) °C

3. Boiling point- 268.9 °C

4. atom number- 2

5. atomic mass- 4.00260 g.mol -1

Chemical Properties

1. Helium and its other family members does not like to bond with other elements so Helium its self is considered the Chemical property of Helium.

Interesting Facts

1. All the helium remaining on the planet is the result of radioactive decay.

2. Concentrations of helium in natural gas in the USA are as high as 7%.( pretty dangerous)

ARGON

Physical Properties

1. Colorless and Odorless.

Chemical Properties

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XENON

Physical Properties

1. Colorless, Odorless, Tasteless.
2. Melting Point: -111.8°C
3. Boiling Point: -108.1°C

Chemical Properties

1. Atomic Number: 54
2. Xenon has nine stable isotopes; an additional 20 unstable isotopes have been identified.

__Interesting Facts__

1. Xenon trioxide (XeO3) is highly explosive.
2. In a vacuum tube, it produces a blue glow when excited by an electrical discharge.
3. Produces better X-rays signals with reduced amount of radiation.
4. Xenon itself is not toxic, but as a compounds are highly toxic, due to their strong oxidizing characteristics.

RADON

Physical Properties

1. Colorless, Oderless
2. Melting Point: 202°K
3. Boiling Point: 211.4°K

Chemical Properties

1. Atomic Number: 86
2. Not Flammable.

__Interesting Facts__

1. The heaviest known mononuclear gas at 298K
2. When below freezing point, Rn shows‘brilliant phosphorescence’ which changes yellow as the temp is lowered. It becomes orange-red at the temp of liquid air.
3. Main Hazard is from inhalation

KRYPTON

Physical Properties

1. Colorless, Odorless, Tasteless.
2. Melting Point: -157.2°C
3. Boiling Point: -153.4°C

Chemical Properties

1. Atomic Number: 36
2. Nonflammable
3. Reacts with fluorine

Interesting Facts

1. One of the rarest gases in the Earth's atmosphere
2. The only radioactive isotope of Krypton, Kr85, is widely used in the medical field in heart shunt studies, and as a triggering agent in discharge type electronic tubes
3. Forms a colorless solid on reaction with fluorine gas

****PHYSICAL PROBERTIES****

Melting Points and Boiling Points

Melting Point:

He: -270ºC

Ne: -249

Ar: -189

Kr: -157

Xe: -112

Rn: -71

Boiling Points:

He: -269C

Ne: -246

Ar: -186

Kr: -153

Xe: -108

Rn: -62

All of the Melting points and boiling points for the noble gases are all very close together; so all of the boiling points are relatively just a few degrees higher than their melting points. Furthermore, they are all at very cold temperatures, therefore we can conclude that most of the time they are gases.

There are trends with these different points. If you look, you will notice that as you go down the list, the temperatures for the different points keeps increasing.

Density (g/cm3) (at 25ºC)

He: 0.00017

Ne: 0.00084

Ar: 0.00166

Kr: 0.00346

Xe: 0.0055

Rn:

All of the noble gases are not very dense, which makes sense, since many of them are in the upper atmospheres. Just like the melting and boiling points, there is a pattern in the density of these gases. The first one, Helium, is, compared to the rest of the noble gases, is not very dense at all. But as you go down the list, it gets denser and denser.

When comparing the noble gases to the periodic table, it’s not safe to say that they are the least dense. There are many of the halogens that are equally as dense. But compared to most of the chemicals on the periodic table, they are some of the least dense.

CHEMICAL PROPERTIES

Some do. As of about 40 years ago, scientists have been able to make some compounds with inert gases. Some have been used in compounds to make explosives and other just form compounds in a lab. The thing to remember is that they were forced. When going about their natural lives, you will never (never say never because there may be an exception) find the inert gases bonded with other elements.

This is a very special group of elements hey rarely have any chemical compounds which means that they are their own chemical comopound.

GOOD LUCK GROUP!!!WORK HARD AND DO UR WORK HEHEHE!!!

HEY GROUP MEMBERS!!!

I thought that this site was really helpful,http://www.chemicalelements.com/groups/noblegases.html