Periodic Table Essay

Potassium essay Potassium is a chemical element on the periodic table with the symbol K from Neo-Latin, Kalium. Potassium comes from the alkali metals family on the periodic table and has one valence electron. It has 20 neutrons,19 protons and the same amount of electrons . It has an atomic number of 19 and an atomic mass of 39.0983. Its Melting point is 146.08 degrees and it's boiling point is 1,398 degrees. In room temperature potassiums phase is solid. The second most dense metal after lithium

Element 95 on the periodic table, Americium was recognised in November 1945 by a chemist Glenn Seaborg who discovered the element as well as co-discovering ten other elements including Plutonium.1 The chemical element americium has atomic number 95 and an atomic weight of 243. Americium is a malleable, silvery white metal that tarnishes slowly in dry air at room temperature. . There are several known isotopes of americium and all of them are radioactive, the most stable being Americium -243 with

Over so many years the periodic table has changed in many years. In the modern periodic table the elements are arranged in order of increasing atomic numbers. In mendeleev’s periodic table they were in arranged in order of increasing atomic weight. The difference in the modern and mendeleev periodic table n 1869, just five years after John Newlands put forward his law of octaves, a Russian chemist called Dmitri Mendeleev published a periodic table. Mendeleev also arranged the elements known at the

Natalie Gorman Heberton Chem 300 period 8 11/23/14 Relative Reactivity and the Periodic Table Purpose: The purpose of this lab is to investigate the relationship between the relative reactivity of several metal elements and where the elements are found on the periodic table. There are many factors pertaining to the order in which the elements are laid out and in this lab, determining the reactivity levels of certain metals will lead to patterns. The placement of elements in groups is usually related

scientist that created the first periodic table. There are many differences between Mendeleev's periodic table. Just a few thing that I will go into more detail about are how the elements were sorted, about how the elements are sorted into families, and what elements were added. But before we get into how the two tables compare and contrast we have to understand The periodic table and how to read it. Mendeleev’s periodic table looks nothing like the present day periodic table but it has the same concept

Interpreting the periodic Table Lab partner’s name: Priscila Baque Scarleth Romero Jilyan Carrera Date: 01-05-14 1. Introduction: Imagine the confusion among chemists during the middle of the nineteenth century. By 1860, more than 60 elements had been discovered. Chemists had to learn the properties of these elements as well as those of the many compounds that they formed a difficult task. And to make matters worse, there was no method for accurately determining an element’s atomic

Two Families in the Periodic Table Lab Report By: YOU Introduction: The purpose of this lab was to find the relative solubilities of some salts of the Alkaline Earths and use that information to find the order which they appear in the periodic table; also use that information to efficiently find an unknown alkaline earth halide. Also to find the relative oxidizing powers of the Halogens given and using that information finding the order of the Halogens in the periodic table; also use that information

Noble gases are the most stable elements of the periodic table. They have many qualities that make them unique to other elemental groups. Noble Gases have many important differences that should be noted when studying the periodic table; such as the number of valence electrons and location, their state of matter, and their reactivity. When studying noble gases you should be aware of what mainly sets them apart from the other elements of the periodic table; their valence electrons. They are unique in

Silicon is a solid in group 14, period 3. Geranium is another solid right under silicon in the periodic table. These two elements are examples of metalloids. Metalloids are elements that are intermediate to metals and solid nonmetals. Silicon and germanium have many uses in our life that give us a lot of things we all have now. Silicon has a lot of uses in our life. If this element did not exist we would not be able to build many houses that are made of bricks and concrete. Silicon is in the form

up with new, advanced technology to benefit us all. Chemistry played a role in developing the periodic table, x-rays, and the telescope. Primarily, the Periodic Table of Elements was primarily thought to be developed by Dmitri Mendeleev. However, “Antoine Lavoisier first established the modern concept of the element in the late 1700s” (worldbook). Mendeleev published his version of the periodic table in 1869. Also, many scientists before Mendeleev