The largest decrease in size was from 3 to 4, and it leveled out after the 5 to 6 decrease. 2. In Part II of this assignment, you graphed the atomic radius of some elements from group 14 on the periodic table. What is the general trend for atomic radius going down that group? As the period number gets bigger, so does the atomic radius.
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.
In chemistry, if you want to refer to a certain isotope you must write it as such: AXZ. X represents the chemical symbol of the element, Z represents the atomic number, and A represents the mass number which is the number of protons and neutrons combined. For example if one were to refer to a hydrogen isotope, they would write it as 1H1 (ordinary hydrogen), 2H1 (deuterium-hydrogen isotope with one neutron), or 3H1 (tritium-isotope with two neutrons). Light elements usually have an equal amount of neutrons and protons; heavy elements need more neutrons than protons in order to stick together. Atoms with too many neutrons, or not enough, can exist for a while, but they will be unstable.
Describe the general trend or patterns that you observed in the atomic radius as you go across the periodic table.  (2 points) Answer: The general trend observed is as the atomic number increases the atomic radius of the element decreases 2. In Part II of this assignment, you graphed the atomic radius of some elements from group 14 on the periodic table. What is the general trend for atomic radius going down that group? (2 points) Answer: The general trend for the atomic radius going down the group is that as the atomic number increases the atomic radius also increases 3. What element in Period 5 of the periodic table is a member of Group 14?
Isotopes Lab By: Darlene Cortez (1st Pd) Background: Atoms of the same element that have different masses are known as isotopes. The difference in mass between isotopes is the result of these atoms having different numbers of neutrons. Key vocabulary: Relative abundance- Relative abundance is a component of biodiversity and refers to how common or rare a species is relative to other species in a defined location or community. Weighted average - An average that takes into account the proportional relevance of each component, rather than treating each component equally. Average Atomic Mass- The mass calculated by summing the masses of an elements isotopes, each multiplied by its natural abundance on earth Mass Number- The total
Mr. Bodner states that French Physicists Jean Baptiste Perrin was the first to use the term Avogadro’s number. Based on his work on Brownian motion in 1909, Perrin reported an estimate of Avogadro’s number. To accurately determine Avogadro’s number requires the measurement of a single quantity on both atomic and macroscopic scales, with the use of the unit of measurement. This was possible because American Physicist Robert Millikan measured the change on an election. The charge on a mole of electrons for some time and is the constant called the Faraday.
Ordinary Tin is composed of ten stable isotopes, which is the largest amount in the periodic table. Thirteen unstable isotopes have been recognized. Tin shows chemical similarity to both neighboring group 14 elements. It can be located between elements: indium and antimony(side by side) and between Germanium and Lead (top and bottom) The Atomic mass of Tin is 50, which is a “magic number” in nuclear physics. There are 28 additional unstable isotopes that are known.
Task 1 Extended Response - Periodic Trends Emma Jeavons Atomic Radius - The atomic radius is the term given to describe the size of an atom. The atomic radius is dependant on how far the electrons of the atom extend. Atomic radius increases as you move down a group, as well as when you move to the left of a period. Therefore, K or potassium has the largest atomic radius out of all the elements on the adjusted periodic table provided. As you move from the first period, to the second and so on, elements gain electron shells.
Nuclear fusion however is the reaction in which two or more nuclei combine together to form a new element with higher atomic number. The fusion of two nuclei with lower masses than iron generally releases energy, while the fusion of nuclei heavier than iron absorbs energy. This means that fusion generally occurs for lighter elements only, and likewise, that fission normally occurs only for heavier elements. For a nuclear fusion reaction to occur it is necessary to bring two nuclei so close that nuclear forces become active and glue the nuclei together. Nuclear forces are small-distance forces and have to act against the electrostatic forces where positively charged nuclei repel each other.
BETA PARTICLES Beta rays are much lighter energy particles. The beta particle is an energetic electron given off by the nucleus of unstable isotopes to restore an energy balance. They leave the nucleus at a speed of 270,000 kilometers per second. They can be stopped, for instance, by an aluminum sheet a few millimeters thick or by 3 meters of air. The RS-500 can detect most energetic beta particles through the case.