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Helium is considered what?
Helium is a chemical element. It is inert and a gas (at room temperature). Helium exists in liquid form only at extremely low temperatures. The boiling point and critical point depend on the isotope of the helium. He-4 boils at 4,2 K and He-3 boils at 3,2 K (1 atm pressure). At normal pressures helium is never a solid. Solid helium requires a temperature of 1-1.5 K (about −272 °C or −457 °F) and about 25 bar (2.5 MPa) of pressure.
How many neutrons does ununoctium have?
Unununium.Element 111, also called unununium (Uuu), chemical element with atomic number 111. It is produced artificially by nuclear fusion (in which a chemical element with larger atoms is produced by fusing together smaller atoms from other elements). Each unununium atom has a very large nucleus, or central mass, containing positively charged particles called protons and neutral particles called neutrons (seeAtom). The large number of particles in the nucleus makes the atom unstable and causes the atom to split apart into smaller components soon after it is created. Scientists gave unununium its temporary name according to a system that uses Latin prefixes for the atomic number (un = 1, un = 1, un = 1), followed by the suffix -ium. Unununium was first discovered in 1994 by scientists at the Heavy-Ion Research Laboratory in Darmstadt, Germany.Unununium has the atomic number 111, which means that each Uuu atom contains 111 protons in the nucleus. Scientists at the Heavy-Ion Research Laboratory created an atom of unununium that contained 161 neutrons, labeled unununium-272 (111 protons + 161 neutrons = unununium-272).Unununium was created by nuclear fusion of the smaller elements bismuth (Bi) andnickel (Ni). Because the unununium nucleus contains so many particles, unununium is unstable and undergoes spontaneous fission, a process in which the atom breaks into smaller "daughter" components. When the atom splits, it releases energy in the form of electromagnetic waves and electrically charged bits of matter. This energy is known as radiation (see Radioactivity). Unununium-272 has a very brief lifespan that is 0.003 seconds. By 1998 unununium-272 was the only confirmed isotope of Element 111. Other isotopes of element 111 would be forms of the element with the same number of protons in the nucleus, but a different number of neutrons.Unununium belongs to Group 11 (Ib) on the periodic table, which also contains the naturally occurring elements copper (Cu), silver (Ag), and gold (Au). Copper, silver, and gold all have the ability to conduct heat and electricity, and to form alloys with other metals. Because elements in the same group, or column, on the periodic table often share similar properties (a pattern known as the periodic law), scientists expect unununium to share properties with other Group 11 elements. However, because of the very limited amount of unununium that has been produced and its extremely short lifespan, scientists have been unable to determine chemical properties of this unstable element.
What is the Highest atomic number on the Periodic Table?
The element provisionally named ununoctium, believed discovered in 2003, has atomic number 118 in Period 7, column 18, with an atomic weight of 294. Once confirmed, it will be given its permanent element name.
What element has the greatest atomic radius?
The element cesium, at the left of row 6, is often cited as having the largest radius.However, francium in row 7 may be larger. There is almost no francium on Earth,as its half-life is 21.8 minutes.*The elements of the lower left hand side of the periodic table have the largest atomic radius. The upper right has the smallest.
How you prepare 0.01M NaOH solution?
Dissolve 40 grams of solid NaOH into enough water that it dissolves completely. Transfer this to a volumetric flask. Then add water until the volume of the solution is 1 liter. Care is needed as heat is generated which affects the volume. It is best to make up with water to about 2 cm short of the mark, allow to cool and then add the balance of the water.
A number between 270 and 280?
The whole numbers between 270 and 280 are:271 272 273 274 275 276 277 278 279
How many days to August 1 from April 28?
In a non-leap year, including the start and end date in the calculation, there are 271 days between the two dates. In a leap year, there are 272 days between the two dates.
How many whole numbers between 259 and 272?
Excluding 259 and 272 there are 11 whole numbers
What is the distance between windsor and yorke?
272 Kms
What is the distance between Frederikshavn and Kolding Denmark?
272 km
The sum of prime numbers between 60 and 75 is?
272
What area was controlled by Rome in 272 B.C?
The extent of the Roman Empire in 272 B.C. was this: Barbarian invaders in 271 B.C. had managed to reach the very middle of the peninsular, but the reigning emperor, Aurelius, was, according to the historian Eutropius, "a man of ability in war." He restored almost of all the old borders, as portrayed above.
What is multiple motor unit summation or recruitment in a muscle?
When a greater number of motor units are present in a muscle and are able to be simultaneously stimulated causing an increase in muscle force (Sherwood, and Kell 271-272).
What is the distance between page AZ and Las Vegas NV?
272 miles
What is half of 272?
It is: 136
What is the driving distance between West Palm Beach and Gainesville?
272 Miles at the least.
How do you evaluate 27 by 64 to the power 2 by 3?
272/3 = (271/3)2 = 32 = 9 and 642/3 = (641/3)2 = 42 = 16 So (27/64)2/3 = 9/16
