Chemical element

Why There Are No Pure Elements From Group 1 & 7 Group 1 elements are alkali metals which are very soft and reacts with metals well. The elements reacts very strongly with water. As you down the elements of group one, the reactivity increases. However, group 7 are halogens which are reactive, but they are metal. They are also different from group one as their reactivity decreases as you go down. Also, the elements becomes darker as you go down the group. Chemical reactions of group 1: The…

regular metals, such as copper, into gold. However, they were not aware at the time that copper and gold were two different atomic elements and instead believed them to be compounds. Thinking these metals could be changed chemically or physically in labs, alchemists pursued this dream to no advantage. Although it is not possible to change ordinary metals to gold through chemical reactions, physical reactions, radioactive decay, or nuclear fission, it is possible to change them through nuclear…

Gilbert Lewis first introduced his theoretical dot structures in 1916. Today, these same dot structures are used to illustrate the chemical bonding nature of atoms. How did Lewis formulate these brilliantly simple representations of nature? The Lewis Dot Structures we know today actually derive their functionality from Lewis’ own model of the atom, the Theory of the Cubical Atom. This essay will explore the functionality of Lewis’ cubical atom and how this model led to the Lewis Dot Structures.…

Phosphorus (chemical symbol P) is an element that comes in the form of three allotropic. A white waxy solid, a red powder or black powder .White phosphorus is poisonous and when it comes in contacts with air (0) it can spontaneously ignite, which is why white phosphorus is stored in water (figure A). Phosphorus boiling point is 280°C and a melting of 44°C. When phosphorus is boiled it forms a red powder (figure B) which is found in the head safety matches (figure C). Black phosphorus is created…

Atoms are the most basic building blocks, everything around us are made out of atoms. Atoms are so small that it can’t be found under the finest microscopes. A tiny spec of dust contains millions of billions of atoms! Even though atoms are tiny, but it actually consist of three different particles: protons, neutrons, and electrons. In every atom, electrons move around the nucleus, the combination of protons and neutrons. The idea of an atom was first discovered by the ancient Greeks, they…

goddess of greek mythology. Titanium has 22 protons, 26 neutrons, and 22 electrons. The atomic number of this element is 47,867. Titanium is a lustrous transition metal. William Gregor was a man who was interested in minerals. He recognized the presence of a new element. The boiling point for this element is 5,948 fahrenheit and the melting point is 3,034 fahrenheit. The titanium chemical properties is more reactive at high temperatures. It can actually catch fire when heated in the presence of…

the Most Important Element Alrecus What is Oxygen? Oxygen is one of the periodic table elements. Oxygen is also a gaseous chemical. Oxygen makes up more than twenty percent of the Earth's air. Oxygen is a dry and unscented. Oxygen is exceptionally receptive. Oxygen was found interestingly by a Swedish Chemist, Carl Wilhelm Scheele, in 1772. Joseph Priestly, an 112, freely, found oxygen in 1774 and distributed his discoveries that year, three years before Scheele distributed. Antoine Lavoisier,…

textbook. While making his textbook he needed a way to organize the elements so it was easier to understand. He put all the elements on notecards and started organizing them in a game he called chemical solitaire. He worked for three days straight completely focused. On the third night he fell asleep and had a dream where all the elements were falling into place. He woke up saying, “In a dream I saw a table where all the elements fell into place as required. Awakening, I immediately wrote it…

etc. One of which were his four postulates over the atom. John Dalton’s Postulates include: Atoms are small, indivisible particles that make up matter Every atom of a certain element are always identical in mass and properties Atoms can not be destroyed, created, or changed into other types of atoms during chemical reactions, they may only be…

How are elements useful for a particular use? An element is made from one type of atom and this article is about the element Scandium. Scandium was discovered in the year 1879 by Scientist Lars Fredrik Nilson in the university of Uppsala. The origin of the name comes from the word Scandia, which is the latin name for Scandinavia. This element belongs to group 3 which consists of transition metals and Scandium shares this group with the element Yttrium. There are 4 groups in the periodic table…