Helium, with the symbol He, has an atomic number of 2, and an atomic mass of 2 AMU's. It has no color. Helium gas is unreactive, colorless, and odorless. Helium has an extremely low melting point (-452º F), and boiling point of close to absolute zero.
Mercury is also the second densest planet in the solar system, only behind earth. Mercury actually has a very thin atmosphere consisting of atoms blown off the planet by solar winds. Mercury is often visible with binoculars, and sometimes even the naked eye. The best place to find Mercury is always near the Sun. The next terrestrial planet, and second planet from the sun, is Venus.
Characteristics of the Element Neon Neon was discovered in 1898 by British chemists Sir William Ramsay and Morris W. Travers as a component of the most volatile fraction of liquefied crude argon obtained from air. Upon applying an electric current to it, the chemists found that it had an orange glow, and they decided that it was not argon, but rather a new element altogether. Neon is not a very common element, but the places it is most abundant in are the earth's atmosphere, and trapped within rocks in the earth's crust. The place where it is most abundant, however, is the throughout the cosmos. In the earth's atmosphere, neon only comprises 0.0018 percent of the volume.
When cut, it possesses a silvery-white color that quickly changes to gray due to oxidation. While it has one of the lowest melting points among all metals (180 °C), it has the highest melting and boiling points of the alkali metals. Lithium has a very low density of 0.534 g/cm3, comparable with that of pine wood. It is the least dense of all elements that are solids at room temperature, the next lightest solid element (potassium, at 0.862 g/cm3) being more than 60% denser. Furthermore, apart from helium and hydrogen, it is less dense than any liquid element, being only 2/3 as dense as liquid nitrogen (0.808 g/cm3).
Copper is one of the best known elements, and studying its atomic structure aids in understanding why copper has the qualities it does: its fascinating characteristics are all predicted by its atomic structure. All atoms are made of three subatomic particles called the proton, the neutron, and the electron. The proton is positively charged while electrons are negatively charged and neutrons have no charge. Protons and neutrons are large and heavy compared to the electron: both the proton and the neutron have a relative mass of 1, while the electron has a relative mass of 1/1836. The heavy protons are held together in a tiny area in the center of the atom called the nucleus.
Needless to say, it would not be an ideal vacation spot. Venus is the hottest planet in the solar system, thanks to the runaway greenhouse effect. The atmosphere of Venus is also majorly different from Earth. It is composed of 97% carbon dioxide and 3% sulfuric acid, with an atmospheric pressure that is ninety-two times that of Earth. This pressure would be the same as being in the lowest depths of the ocean on Earth.
Mercury Mercury’s gravitational force is 0.37.Mercury is the first and closest planet away from the sun. It is also the smallest planet in all our solar system. It’s a bit smaller than earth and is almost the same size as our moon. Mercury once was a big planet but then time after time it shrunk, and now it has wrinkles. It’s really hot that the strongest metal in the world, which is lead, can melt.
Protons and neutrons themselves are made of individual particles called quarks. A quark is any of a group of subatomic particles that are among the fundamental constituents. (abyss.uoregon.edu) There are over two hundred subatomic particles that have been detected by the super collider, but not all of those are fundamental, meaning that they are all the same, have no shape, and cannot be broken down into something smaller. These fundamental particles include electrons, and quarks. These fundamental particles are the most basic and smallest unit of matter that has yet to be discovered by scientists.
The best way to describe Mercury is, " . . . small, heavily cratered and airless " (Morrison, 71, 1993). Venus is the second closest planet to the sun and is said to " .
Mercury Mercury’s symbol is Hg, its atomic number is 80, its atomic mass is 200.59, its in group 12 and in period 6, and it also has two valence electrons. Its standard state is liquid at 298ºK and it is the heaviest known elemental liquid. It has a silvery white color. It is named after the planet "Mercury" the origin of the symbol Hg is the Latin word "hydrargyrum" meaning "liquid silver". Mercury was known to ancient Chinese and Hindus before 2000 B.C.