Period 5 element

Structures. The Theory of the Cubical Atom was first published in 1916 in the article The Atom and the Molecule; however, it was developed fourteen years prior in 1902. The model’s purpose was to illustrate an atoms valence, or “combining power of an element” (Oxford Dictionary). He based his model on Abegg’s Law, which states: “the total…

 Comment: The three bonds (one solid line, one wedged line and one dashed line) that are attached to the + carbon atom are turned inside out. If the starting material has Br on the right side of the + carbon atom, the final product will have OH on the left side of the + carbon atom and vice versa.  Comment: There is only one hump for the energy profile of an SN2 reaction. As we shall see later, there are two humps for the energy profile of an SN1 reaction. One easy way to…

friend and partner Jack Livingwood used targets of tellurium and bombarded it with deuterons and some with neutrons to reveal iodine 131, which had a half-life of eight days. (talk about iodine 131’s importance). In Seaborg’s life, the meaning of this element held major importance due to its aid in his mother’s cure of hyperthyroidism. Seaborg and Jack also discovered cobalt 60, which is also a critical medical isotope. Cobalt 60 emits gamma radiation which in turn focuses directly on cancer…

your products, should equal the total mass of your reactants. Mass is not lost or gained in a reaction, rather the atoms are being rearranged. Law of definite proportions states that a specific compound always contains the same elements, and proportions of those elements. For Example, water, H2O, always has 2 hydrogen atoms attached to an oxygen atom, regardless of the quantity the ratio of hydrogen to oxygen will always be one part hydrogen to eight parts oxygen. Stoichiometry is very…

showing that the copper had a “fixed ratio of elements” (Hayes, 2012). In this case, Proust proved that no matter how you changed the numbers, the weight proportion in copper oxide, copper and oxygen was always present and remained the same (Hayes, 2012). Based on Proust’s experiments, he concluded that the mass and proportions of elements stay the same. Proust stated his law as “A given compound always has the same proportion of it’s constituent elements by mass” (Hayes, 2012). According to…

and differences in the crystal chemical relationship between quartz (SiO2) and FePO4. The structural parameters of α-FePO4 at low temperature range skews towards the parameter values for ß-quartz type when it is at high temperatures. Angles between elements Fe, O and P increase whilst tilt angles decrease significantly as changes between the two phases near the temperature of 980K. Distance between Fe and O, and between Si and O in FePO4 and quartz (SiO2) is non linear with temperature in both…

A Pentacle is very similar to a pentagram. A pentagram is a five-pointed star, each point representing one of the five elements, earth, air, fire, water, and akasha also known as spirit. A pentacle is a pentagram encased in another shape; most commonly a circle but it can any shape, a pentagon, a triangle, or another star. The word its self is broken down into two pieces, “penta” meaning five sided, and “cle” referencing the circle. It is a symbol cloaked in history and dripping with meaning.…

1. INTRODUCTION 1.1 History In 1892, a scientist at Oxford University, Sir James Dewar has invented the “vacuum flask”. This bottle created a vacuum, which is an effective insulator. Dewar created his insulated bottle by sealing one bottle inside another and pumping out the air between them. In 1904, German glass-blower Reinhold burger and his partner Albert Aschenbrenner who patented Dewar’s invention and manufactured it for commercial use. They are the one who made bottles for Dewar. Burger…

naturally diamagnetic element and has one of the lowest values of thermal conductivity among metals. [27] Bismuth is a brittle metal with a white hue, however, an iridescent oxide may form on the surface showing many colors from yellow to blue. Bismuth has a spiral…

The purpose of this paper is to find out what material is the gold crown ring made out of. What is interesting about this topic is that there is a lot of ways to study the gold crown ring. For example, you can test the mass, volume, and density of the ring. In the periodic table Au is the symbol for Gold, it’s atomic number is 79. The Properties of Matter are Mass, Weight, Volume, and Length. Each property has its own way of working with different types of things. It is believed that the…