Period 5 element

4) Elements can be created naturally through processes such as the big bang or other methods conducted by scientists. Scientists are able to create elements by using atomic colliders and quantum calculation. One process that scientists use to create new elements is to add protons one by one into an atom. This would increase the atomic number of the element which would change the identity of the element. The addition of protons causes a repulsion between the atoms because two positive forces…

Our world is made of elements and combinations of elements called compounds. An element is a pure substance made of atoms that are all of the same type. At this given time, 116 elements are known, and roughly about 90 of these occur naturally. But how do we know what elements are in our universe?, Scientists have developed many theories as to why and how we know. These theories consist of mainly the Big Bang Theory and how it had created the first and lightest elements in our universe, or Red…

categorized? All of these questions were analyzed over and over by scientist for hundreds of years, to form what is called the atomic theory. Today the atomic theory states that all matter is comprised of tiny particles called atoms, that atoms of the same element are all identical in mass and properties and cannot be created or destroyed, and that compounds are…

Theq element on the Periodic table that is best representation of my personality would be element 13, Aluminum. Properties of Aluminum its included high melting point, conductivity, malleability, and non-toxicity. Aluminum’s high melting point represents my determined personality. This is because I can face adversity well. Even when situations occur that are extremely unfavorable I am able to keep a cool head and think straight. I can persevere and stay strong allowing myself to solve and get…

life: Teaching is an active activity. Similarly Vasu Master was an active teacher during his profession. Vasu master was an English teacher in P.G. Boys School in a small town Elipetti. The novel begins with the retirement of Vasu. The significant element in this novel is ending of Vasu’s profession is the beginning of the novel. It paves the way for the beginning of Vasu’s new life, that is, life after retirement. Even the retirement Vasu was not satisfied in his profession. Even though he…

“Matter, though divisible in an extreme degree, is nevertheless not infinitely divisible. That is, there must be some point beyond which we cannot go in the division of matter… I have chosen the word “atom” to signify these ultimate particles.” – John Dalton. John Dalton is a British chemist who was born in September 6, 1766 in Eaglesfield, England and died on July 26, 1844 in Manchester, England. At the age of 12, he started teaching at a Quaker school in Cumberland. Dalton worked as a farmhand…

group 2 element with the symbol, Mg, an atomic number of 12 and has a molar mass of 24.31 [1]. It is made up of 12 protons, 12 neutrons, and 12 electrons. It’s electron configuration is 1s2,2s2,2p6,3s2 this given as noble gas configuration is [Ne]3s2. It has a melting point of 650 °C and a boiling point of 1090 °C [2]. It has a metallic radius of 150 pm, a coordination number of 72(6), and a density of 1.74 g cm-1 [3]. It is a silvery white metal; this is shared by all of the group 2 elements. …

1: Properties of Hydrogen Sulphide (AIHA, 1991): Description Hydrogen Sulphide Molecular formula H2S Molar mass 34.08g/mol Boiling point -60.4 0C Melting point -85.5 0C Critical temperature 100.50C Density 1.43g/m3 Short Term Exposure Limit(STEL) 5 ppm (15 min) Immediate Damage to Life or Health (IDLH) 100 ppm Vapour pressure 18.266 bar at 210C Conversion factor 1ppm= 1.5 mg/m3 2.1.2. Health Effects Hydrogen sulphide is an asphyxiant and irritant gas. Concentrations above a limit of 20…

Circular Dichroism (CD) fundamentals. CD is defined as the difference between absorptions of left (Al) and right (Ar) circularly polarized light beams, CD=Al-Ar For each absorption band, the CD of two enantiomers are always exactly opposite. Theory. For each electronic transition one can define an electric (µij≠0) and a magnetic (mij≠0) transition dipole. Both can lead to absorption of radiation, the intensity of which is directly related to the oscillator strength f, fij≈| µij |2+ | mij |2 In…

the intricacies of the materials that allow the modern world to exist and thrive. In chapter 8, Unbreakable, Miodownik discusses the significance and characteristics of various forms of carbon in a historical lens. Although derived from the same element, graphite, diamond, and graphene all have unique properties unlike any other materials. Miodownik begins by offering a relatable anecdote to his childhood art class in order to truly show the readers the prevalence and wonder of carbon. He then…