Such as radiation, Different type of radiation, isotopes and half-life. Isotopes can be divided into 2 groups. Stable and unstable isotopes. Isotopes that has an atomic number lower than 83 it is stable. If the atomic number is greater than 83 or if the ratio of neutrons to protons places it outside the zone of stability, it is unstable.
For an example, the eclipsed conformation of ethane has extra 2.9 kcal/mol of energy compared to staggered conformation of ethane. This is due to the torsional strain. Torsional strain can be also defined as eclipsing strain. It arises from the repulsive force between the electron clouds in the Carbon-Hydrogen bonds which are not sharing an atom and cause the increase of potential energy since the bonds are closed to each other in eclipsed conformer. 1.0 CONFORMATIONAL STEREOISOMERS OF BUTANE Butane can be presented in an infinite number of conformations.
Activity: 1. Observe and describe the effect of different wavelengths on speed of electrons emitted. 2. Observe and describe the effect of different levels of intensity on number of electrons emitted. 3.
Nobody is quite sure exactly what it is, except that it’s a fundamental property of matter, existing in 2 opposite polarities called positive and negative. Protons, 1 of 2 particles in atomic nuclei, are positive, while neutrons have no charge. Orbiting around the nucleus are electrons, the same number as protons inside the nucleus. Although electrons have 1,836 times less mass than protons, an electron has an equal (but opposite) charge (positive). Because they’re light and positioned outside the nucleus, electrons are much more easily dislodged from atoms than protons, so they’re the crucial carriers of electric charge.
Mars surface temperature may be Earth like. A Martian day is only 40 minutes longer than an Earth day. Differences: Due to its core, Earth has extreme magnetic field. Mars field is not too magnetic. Mars’s atmosphere has less density, similar to 1% of Earths atmosphere.
Ytterbium is a rare earth metal, one of the elements found in Row 6 of the periodic table. It has an atomic number of 70, an atomic mass of 173.04, and a chemical symbol of Yb. Ytterbium is a typical metal that is both ductile and malleable. It has a melting point of 1,515°F (824°C), a boiling point of 2,600°F (1,427°C), and a density of 7.01 grams per cubic centimeter. Ytterbium is a relatively reactive element that is usually stored in sealed containers to prevent its reacting with oxygen of the air.
Chemical Properties: Reaction with air: - When plutonium is exposed to air it begins to oxidise, it forms a yellowish-brown outer coat and begins to tarnish. Soluble in: - Hydrochloric acid Insoluble in: - Nitric acid - Concentrated hydrogen sulfide The Critical Mass: - Around 300 grams which is only about a third of that of Uranium 235 Allotopic Structures: - Plutonium exhibits six forms of crystalline structures. The only form that exists at room temperature is the alpha structure. It has the highest electrical resistivity of any metallic
Question # 1: Part A How many electrons and protons in an atom of vanadium? Answer # 1: Atomic number = number of protons = 23 Mass number = number of protons + neutrons Mass number = 51 g/mole Number of neutrons = 51-23 Number of Neutrons = 28 Number of electrons = atomic number = 23 Question # 1: Part B Explain in 2 or 3 sentences how the atomic weight is what is reported. Answer # 1: Atomic weight or atomic mass is basically the average mass of atoms of an element. Atomic mass is calculated by using the naturally occurring relative abundance of isotopes. Atomic weight determines the size of the atom.
On the first ring there will be 2 electrons and on the second ring there is 8 electrons. That gives them a total of 10 electrons. Along with atomic number, protons, and electrons there is a atomic mass which is 20.1797. Neon was discovered by Sir William Ramsay, a Scottish chemist, and Morris M. Travers, an English chemist, shortly after their discovery of Krypton. Like krypton, neon was discovered through the study of liquefied air.
Copper is a chemical element with the symbol Cu and atomic number twenty-nine. It is also a solid at room temperature. Copper was most likely the first element ever manipulated by humans. In fact, humans discovered copper during the Paleolithic era. Copper was also very important during the copper and bronze age.