Noble Gases

Riza, Arabelle, Cassey

Honors Chemistry

Period 1

The six noble gases are found in group 18 of the periodic table.

They are the most stable due to having the maximum number of valence electrons their outer shell can hold.

Period: 1

Electronegativity: zero - helium does not attract electrons.

Ionization energy: 24.587 eV

Electron affinity: 0 kJ mol‑1

Density: 0.0001785 grams per cubic centimeter

Melting Point:

0.95 K (-272.2°C or -458.0°F)

Boiling Point:

4.22 K (-268.93°C or -452.07°F)

Interesting fact: Helium is the second most abundant element in the universe and was discovered on the sun before it was found on earth.

Period: 2

Electronegativity: zero - Neon does not attract electrons

Ionization energy: 21.565 eV

Electron affinity: 0 kJ mol‑1

Density:  0.0008999 grams per cubic centimeter

Melting Point: 24.56 K (-248.59°C or -415.46°F)

Boiling Point: 27.07 K (-246.08°C or -410.94°F)

Interesting fact: Although neon is the fourth most abundant element in the universe, only 0.0018% of the earth's atmosphere  is neon.

Period 3

The number of electronegatively is zero because because they don't attract electrons

Ionisation energies 1st: 1520.571 2nd 2665.857

Electron Affinity: (kj mol^-1): Not stable

Density (g cm^-3): o.oo1633

Melting Point: -189.34 C

Boiling Point: -185.848 C

Interesting fact: Argon is the third most prevalent gas in the Earth's atmosphere, found at 9,300 parts per million.

Period: 4

Electronegativity: 3

Kr I Ground State 1s22s22p63s23p63d104s24p6 1S0

Ionization energy 112914.50 cm-1 (13.99961 eV)

Kr II Ground State 1s22s22p63s23p63d104s24p5 2P°3/2
Ionization energy 196475.4 cm-1 (24.35984 eV)

Electron Affinity: o kj/mol

Density: 0.003733 grams per cubic centimeter

Melting Point: -251.25F

Boiling Point: -243.80 F

Interesting fact: Krypton is one of the rarest gases on Earth, composing only 1 part per million of the atmosphere by volume.

Period: 5

Electronegativity: 2.6

Ionization energy: 12.130 eV

Electron Affinity: 0 kJ/mol

Density: 0.005887 grams per cubic centimeter

Melting Point: 161.36 K (-111.79°C or -169.22°F)

Boiling Point: 165.03 K (-108.12°C or -162.62°F)

Interesting fact: Xenon produces a brilliant white flash of light when it is excited electrically.

Period: 6

Electronegativity: 2.2

Ionization energy: 10.745 eV

Electron affinity: 0 kJ/mol

Density: 0.00973 grams per cubic centimeter

Melting Point: 202 K (-71°C or -96°F)

Boiling Point: 211.45 K (-61.7°C or -79.1°F)

Interesting fact: At normal room temperatures, radon is a colorless, odorless, radioactive gas.

References


* The Periodic Table of Elements. (n.d.). Retrieved February 25, 2015, from http://education.jlab.org/itselemental/

* WebElements Periodic Table: The periodic table on the web. (n.d.). Retrieved February 25, 2015, from http://www.webelements.com

* Electron Affinity of the elements. (n.d.). Retrieved February 25, 2015, from http://periodictable.com/Properties/A/ElectronAff...

* Noble gas. (n.d.). Retrieved February 25, 2015, from http://www.sciencedaily.com/articles/n/noble_gas....