Element 115 : Moscovium is a superheavy synthetic element with symbol Mc and atomic number 115.
Atomic symbol |
Atomic structure . |
The work was a collaboration between science teams led by Yuri Oganessian and Ken Moody.
The discovery was formally accepted on December 30, 2015 by The International Union of Pure and Applied Chemistry (IUPAC) and The International Union of Pure and Applied Physics (IUPAP), and a new superheavy element took its place in the seventh row of the periodic table.
General properties
|
|
Atomic number (Z)
|
115
|
Group , block
|
group 15 (pnictogens), p-block
|
Period
|
period 7
|
Mass number
|
290
|
Electron cofiguration
|
[Rn] 5f14 6d10 7s2 7p3(predicted)
|
Electrons per shell
|
2, 8, 18, 32, 32, 18, 5 (predicted)
|
The reaction was a fusion of element 20 with element 95: calcium-48 with americium-243.
The experiment began on July 14, 2003 and ended on August 10, 2003.
Calcium ions were formed into a beam in a cyclotron (a particle accelerator) and fired at a target layer of americium deposited on titanium foil.
Four atoms of element 115 (moscovium) were produced, which alpha decayed producing element 113, (nihonium).
243
- 95Am
+ 48
20Ca
→ 288
115Mc
+ 3 1
0n
→ - 284
113Nh
+
α - 243
95Am
+ 48
20Ca
→ 287
115Mc
+ 4 1
0n
→ - 283
113Nh
+
α
Physical properties
|
|
Phase
|
solid (predicted)
|
Melting point
|
670 K (400 °C,
750 °F) (predicted)
|
Boiling point
|
~1400 K (~1100 °C, ~2000 °F) (predicted)
|
Density
|
13.5 g/cm3 (predicted)
|
Heat of fusion
|
5.90–5.98 kJ/mol(extrapolated)
|
Heat of vapourization
|
138 kJ/mol (predicted)
|
Main isotopes of moscovium
|
|
290Mc
|
0.8 s (half-life)
|
289Mc
|
0.3 s (half-life)
|
288Mc
|
0.2 (half-life)
|
287Mc
|
40 ms (half-life)
|
Extraterrestrial
- These elements occur naturally in other star systems .
- These are used by extraterrestrial beings to power there crafts , and travel large distance in space in short span of time .
Island of stability.
In nuclear physics, the island of stability is the prediction that a set of heavy isotopes with a near magic number of protons and neutrons will temporarily reverse the trend of decreasing stability in elements heavier than uranium.
Estimates about the amount of stability on the island are usually around a half-life of minutes or days, with some optimistic predictions expecting half-lives of millions of years.
- Moscovium is expected to be in the middle of an island of stability centered on copernicium (element 112) and flerovium (element 114): the reasons for the presence of this island, however, are still not well understood.Due to the expected high fission barriers, any nucleus within this island of stability exclusively decays by alpha decay and perhaps some electron capture and beta decay.Although the known isotopes of moscovium do not actually have enough neutrons to be on the island of stability, they can be seen to approach the island as in general, the heavier isotopes are the longer-lived ones.