Chemical elements Essays

Metallic chemical element chemically active, soft white color, symbol Cs, is located in the first group of the periodic table which means that he belongs to a group of alkaline elements. Atomic number 55 and atomic weight 132.905, the melting point of 28.4 degrees Celsius and a boiling point of 671 degrees Celsius and density of 1.87 g / cm 3. Cesium was discovered in 1860 by the German chemist Robert Bunsen, German physicist Gustav Kirchoff during the use of the spectroscope when they analyzed the

The chemical elements are divided into two broad groups, the metals and the non-metals. In this experiment, you will examine some members of the metal group and identify similarities and differences in their physical and chemical properties. Metals are the elements that are found in the left of the periodic table with high electrical and thermal conductivity. Metals lose electrons to create positive ion charges. Metals have a unique shine, are prone to forming, have a high tendency to form cations

Calcium is one of the 119 chemical elements in the periodic table, often symbolises as Ca and its atomic number is 20. Calcium is a soft silvery alkaline metal and it is also the fifth of the most abundant element by mass on the Earth, but it is not easy to find in nature because it easily reacts with water and oxygen. It is important for all the living organisms, especially for sells. Calcium is found in many foods that people eat everyday, people have to get and consume a specific amount of calcium

Magnesium is a chemical element with the symbol “Mg”. Magnesium is a shiny gray solid. The atomic number is 12 and it’s atomic mass is 24.305. Joseph Black a Scottish physician and chemist recognized magnesium as an element in 1755 but it was isolated by Sir Humphry Davy in 1808 (Periodic Table). High magnesium can be found in foods including nuts, fish, beans, avocados, yogurt, bananas, dried fruit, dark chocolate, and more. In Magnesium there are 12 electrons, 12 neutrons, and 12 protons. It’s

essential concepts for scientists to understand, because they explain how chemicals and elements act and react. Atoms help show what elements do when put in different circumstances and why they do that. An atom’s structure is based on its number of shells or periods. Those are the orbitals surrounding the atom where the electrons are. Atoms are made of electrons, protons, and neutrons, and the number of those depends on the element. The amount of electrons and protons depends on the element’s atomic

book mentioning about various chemical substances, The Disappearing Spoon, focuses on the history of the periodic table by collaborating all the various information about the chemical substances into stories. These stories reveal how each of these element affect the people who discovered them, in ways that are both positive and negative to the discoverer. At the beginning of the book, the author mentions about this element named Mercury. As stated in the book, the chemical name of Mercury is Hydragyrm

year of 1825. Alum was used by the Greek and Romans for medicine as an astringent, and dyeing processes. Aluminum is a chemical element that is located in the boron group. Aluminum’s chemical symbol is Al, and its atomic number is 13. The chemical is a silvery- white, nonmagnetic, ductile metal, that is used all throughout the universe. It’s also the third most abundant element , and the most abundant in the Earth’s crust. Aluminum was discovered in the Earth’s crust in the as early as 1787 and

In this paper, is the basic information of the dangerous element; plutonium (Pu). Plutonium is a very fascinating element on the periodic table. It is fascinating regarding its toxic potency and involvement in weapons. Which is why I am choosing to do a paper on this element, people need to realize both how dangerous it is, what it is, how it came to be, and what it can do. Plutonium is in the transitional metals section of the periodic table. Plutonium has the atomic number 94 and a molar mass

use several elements for chemical equations and experiments based on their properties. This concept is known as The Periodic Table which, cited from the Merriam-Webster dictionary, is "an arrangement of chemical elements based on the periodic law". However, even though he was the first to find out a pattern between every element, he unfortunately was not the first to attempt at the arrangement of the elements. The periodic table of elements is a very organized set of chemical elements placed in many

Dmitri Mendeleev is one of the greatest chemists of all time. Among his accomplishments, Mendeleev created the Periodic Table of Elements and wrote many chemistry textbooks. Some of those textbooks are still studied today. Without Mendeleev, the field of chemistry would not be the same. Additionally, without Mendeleev, chemists might not have discovered the periodic table till much later. The works and discoveries of Dmitri Mendeleev have changed the world. Mendeleev starting impacting others

Chapter 2 Fundamental Building Blocks: Chemistry, Water, and pH 1. Cells that make up complex living things do what they do because of a chemical reaction 2. Repulsion & bonding, latching on & re-forming, depositing & breaking down what makes people plants and birds function at this level is chemistry 2.1 Chemistry’s Building Block: The Atom 1. Matter could defined as anything that takes up space and has a mass 2. Mass it’s a measure of matter in any given object 3. Atom are composed of tiny

are arranged in different energy levels and they orbit around the nucleus like the Earth revolves around the Sun. Electrons are important in atoms, compounds, and chemical bonds involved in chemical reactions. These subatomic particles have importanance to the organization of elements into periods & groups, characteristics of elements in the same periods & groups, and the formation of compounds based on periodic table placement. The organization of periods and groups consist of the number of valence

"Periodic Table of Elements." Periodic Table of Elements: Los Alamos National Laboratory.Department of Energy, 2016. Web. 25 June 2017. The group Uranium is found in is called actinides. The period Uranium is found is 7, and the block is block F. The symbol for Uranium is U. The atomic mass is 238.029 moles. The electron configuration for Uranium is [Rn]7s^25F^36D^1. The boiling point is 4131 C and the melting point is 1135 C. Uranium has 92 protons, 146 electrons, and 92 neutrons. Uranium’s

the many elements that are included on the legendary Period Table of Elements. It is the chemical element that holds the atomic number 94 and is a very dense, silvery, radioactive metal that can be found in the fuel in nuclear reactors as well as in explosives for nuclear fission weapons. But, recently Gregory R. Choppin Professor of Chemistry at Florida State University, Thomas Albrecht-Schmitt, has unlocked an amazing plutonium discovery providing evidence that plutonium (and other chemical elements)

The Periodic Table is used to show how elements are similar. The elements are split into groups and periods. Elements in the same columns have similar chemical and physical properties. I will be describing three of the element on the periodic table and explain how the earth would be like without them. These elements, that I have chosen are Rhenium, Osmium, and Iridium Rhenium is element 75 on the periodic table as a metal. It is located under manganese, but it was not always there. Rhenium was discovered

of time has always meant a significant amount of importance to science. Hydrogen for those who do not know hydrogen is the most abundant element in the universe. Nearly nine out of every ten atoms in the universe are hydrogen atoms. Hydrogen is with oxygen and silicon in abundance in the universe making them the big three. Hydrogen is the simplest of all elements. It only consists of one proton and one electron. Hydrogen was first discovered in seventeen sixty-six by English Chemist and physicist

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

The element Neon has a symbol of Ne. Neon’s atomic number is 10, which is the same as its protons. The protons and electrons are always the same. That means the electrons are 10 and put into two different rings. 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,

trying to organize the elements. He was writing the properties of the elements and arranging them. Until he realized, that by putting them in order of increasing atomic weight the next certain types of elements regularly occurred. The other person that helped develop the Periodic Table was Antoine

matter is composed of extremely small particles called atoms which cannot be subdivided, created, or destroyed, atoms of a given element are identical in their physical and chemical properties, atoms of different elements differ in their physical and chemical properties, atoms of different elements combine in simple, whole number ratios to form compounds, and in chemical reactions, atoms are combined, separated, or rearranged