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

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

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

"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

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

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

What are atoms? Well, atoms are the base of any chemical element. Atoms consist of in multiple things, in which these things scientists of the past have discovered, and they are so well known, poems and stories are made about them. In fact, the Periodic Table of Elements is made up of atoms. Atoms are the smallest bit of matter. They are matter and matter is them. Atoms are made of multiple things. Their layout is a dense nucleus surrounded by a large cloud of electrons. The “cloud” of electrons

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

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

The organization of the periodic table takes account of many different factors. All elements in the table display a periodic trend. Electron configuration and properties also affect the periodic table. The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding cloud of electrons. The periodic table depicts atomic radius by configuring them from smallest to largest as you move

symbols. Do you know who made it? The creator was a chemist named Mendeleev. His dream was to organize chemistry in a better way. Using the Periodic table Mendeleev predicted the existence and properties of new chemical elements. The periodic table has helped scientists study the elements for over a hundred years. Mendeleev lived from 1834-1907. He was born February 8th 1834 in Verkhnie Aremzyani which is a Russian province in Siberia Russia. He may have had sixteen siblings but we don't know

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

analyzed a mineral rutile (TiO2) and he named the element titanium after the Titans, the powerful sons of the earth in Greek mythological [Polmer (2006)]. Titanium is the fourth gorgeous metal after aluminum, iron, and magnesium. Extraction of titanium from its ores was not developed on a commercial scale until the Kroll’s process was developed in 1950. Today, a large number of titanium and titanium alloys are used in various applications like chemical and petrochemical industries as well as other consumer

Elements make up everything on the earth. Many different elements are discovered throughout the years. Elements that have already been discovered are arranged in a model called the periodic table. Dimitri Mendeleev founded the periodic table in 1869. The periodic table tells you many things about an element. It places elements in order relative atomic mass. Mendeleev realized that the characteristics of the elements where according to their atomic weight, so he arranged them so elements with the

Electrons Outermost shell is called its valence shell. Valence shell has the strongest energy and the most reactive. Inner shell don’t participate in chemical bonding and reactions (usually). Valence electrons can be gained/lost/shared to form chemical bonding (from this reason elements with same number of valence electrons tend to have similar chemical property). Since they gain/lose/share the same way. Free Electrons Valence shell electrons have the weakest attraction since they are the furthest to