| Neon | |
|---|---|
 | |
| Identification | |
Symbol |
Ne
|
Block |
p-block
|
Group |
Group 18
|
Period |
Period 2
|
| Atomic Information | |
Atomic Number |
10
|
Atomic Radius |
58 pm
|
Mass |
20.179 u
|
Category |
Noble gas
|
Standard state(298 K) |
|
Electronic Configuration |
[He]2s22p6
|
Electronegativity (Pauling) |
Unknown
|
Unknown
| |
First ionisation energy |
Unknown
|
| Physical Properties | |
Color |
Colourless
|
Melting Point |
24.56 K
|
Boiling Point |
27.104 K
|
Density of solid |
Unknown
|
Unknown
| |
| Heat Properties | |
Enthalpy of fusion |
Unknown
|
Enthalpy of atomisation |
Unknown
|
Enthalpy of vaporisation |
Unknown
|
Neon is the tenth element in the Periodic table according to its atomic number.Neon is a colorless, odorless, inert monatomic gas under standard conditions. It is about two-thirds the density of air. Neon is inert, chemically, and doesnot form any compounds. It was discovered in 1898 along krypton and xenon. Neon has 14 isotopes whose half-lives are known, with mass numbers 16 to 29. Naturally occurring neon is a mixture of its three stable isotopes and they are found in the percentages shown: 20Ne (90.5%), 21Ne (0.7%) and 22Ne (9.2%).
Discovery of Neon[]
Neon was discovered in 1898 by William Ramsay and Morris Travers at University College London.
This was not the first time Ramsay had discovered a new element.
In 1894, he and Lord Rayleigh had discovered argon. Then, in 1895, Ramsay obtained the world’s first sample of helium. (Cleve and Langlet independently also obtained helium.)
Ramsay and Travers were aware an element must sit between helium and argon in the periodic table. But how could they find it?
Having found helium in a radioactive mineral, Ramsay thought it was possible he could find the new element in another such mineral. He and Travers spent some time working with a number of minerals, trying unsuccessfully to drive out some of the as yet undiscovered gas.
Aware of the history of chemistry, Ramsay knew that sometimes one new element can hide another. For example, Berzelius discovered cerium in the mineral that came to be known as cerite. Some years later Mosander, one of Berzelius’s former students, who had continued to study cerite, discovered the new element lanthanum. Lanthanum had been present in the cerite all along, but Berzelius had not found it. Ramsay wondered about the possibility of finding small amounts of the elusive new element hiding in one of his earlier discoveries, argon.
Ramsay and Travers froze a sample of argon using liquid air. They then slowly evaporated the argon under reduced pressure and collected the first gas that came off.
To obtain the gas’s spectrum, Travers applied a high voltage to the gas in a vacuum tube and we may reasonably guess that his mouth fell open at what he saw.
He later commented, “the blaze of crimson light from the tube told its own story and was a sight to dwell upon and never forget… For the moment the actual spectrum of the gas did not matter in the least, for nothing in the world gave a glow such as we had seen.” This was the first time anyone had seen the glow of a neon light. Ramsay named the newly discovered element ‘neon’ which is Greek for ‘new.’
Interesting Facts about Neon
- Although it is relatively rare on our planet, neon is the fifth most abundant element in the universe.
- 0.0018 percent of Earth’s atmosphere is neon.
- If you could gather all the neon from the rooms in a typical new home in the United States, you would get 10 liters (2 gallons) of neon gas.
| 1 H |
2 He | ||||||||||||||||
| 3 Li |
4 Be |
5 B |
6 C |
7 N |
8 O |
9 F |
10 Ne | ||||||||||
| 11 Na |
12 Mg |
13 Al |
14 Si |
15 P |
16 S |
17 Cl |
18 Ar | ||||||||||
| 19 K |
20 Ca |
21 Sc |
22 Ti |
23 V |
24 Cr |
25 Mn |
26 Fe |
27 Co |
28 Ni |
29 Cu |
30 Zn |
31 Ga |
32 Ge |
33 As |
34 Se |
35 Br |
36 Kr |
| 37 Rb |
38 Sr |
39 Y |
40 Zr |
41 Nb |
42 Mo |
43 Tc |
44 Ru |
45 Rh |
46 Pd |
47 Ag |
48 Cd |
49 In |
50 Sn |
51 Sb |
52 Te |
53 I |
54 Xe |
| 55 Cs |
56 Ba |
* | 72 Hf |
73 Ta |
74 W |
75 Re |
76 Os |
77 Ir |
78 Pt |
79 Au |
80 Hg |
81 Tl |
82 Pb |
83 Bi |
84 Po |
85 At |
86 Rn |
| 87 Fr |
88 Ra |
** | 104 Rf |
105 Db |
106 Sg |
107 Bh |
108 Hs |
109 Mt |
110 Ds |
111 Rg |
112 Cn |
113 Nh |
114 Fl |
115 Mc |
116 Lv |
117 Ts |
118 Og |
| 119 Uue |
120 Ubn |
*** | 158 Ups |
159 Upo |
160 Upe |
161 Uhn |
| * | 57 La |
58 Ce |
59 Pr |
60 Nd |
61 Pm |
62 Sm |
63 Eu |
64 Gd |
65 Tb |
66 Dy |
67 Ho |
68 Er |
69 Tm |
70 Yb |
71 Lu |
| ** | 89 Ac |
90 Th |
91 Pa |
92 U |
93 Np |
94 Pu |
95 Am |
96 Cm |
97 Bk |
98 Cf |
99 Es |
100 Fm |
101 Md |
102 No |
103 Lr |