Chemical elements

Neon is a chemical element. Neon was discovered by two chemists named Sir William Ramsay and Morris W. Travers in the country of England. Ramsay and Travers discovered this element in the year or 1898. The word “neon” is a Greek word that means “new”. Neon was discovered through the studies of liquefied air. This element belongs to the “noble gases” group in the periodic table. The symbol for this element is ‘Ne’. Neon is in period two. The atomic number of neon is 10. The atomic mass of neon

Element: Lithium Lithium and Its Basic Characteristics The chemical element Lithium (Li) has an atomic number 3and is the first member of the Alkali metal family. This element is also the least dense of all the metals – about half of the density of water. Lithium is a very soft silvery metal that has a melting point of 180.54˚c and a boiling point of 1,335˚c. This is an active element but nit as active as the other Alkali metals. This element reacts slowly on a water having a room temperature and

What is Calcium? The chemical element Calcium (Ca) is a malleable, ductile, soft metal. It's located in period four and group two of the periodic table. Calcium atoms have 20 electrons and 20 protons, there are two valence electrons in the outer shells. Its mass number is approximately 40.08. Calcium has four stable isotopes including 40Ca, 42Ca, 43Ca, and 44Ca; 97% of naturally occurring calcium is in the isotope 40Ca. Isotopes are atoms that have the same number of protons and electrons, but

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

All the chemical elements are given a unique atomic number; copper is the 29 atomic numbers. Atoms are made of three kinds of smaller particles, called protons, neutrons and electrons the atomic number is the number of protons in the atom. Each element is first identified at room temperature and pressure as being solid, liquid or gas therefore copper is a solid. Elements, like copper, have other properties and characteristics physical properties can be observed and measured whereas chemical properties

Strontium is a chemical element with symbol Sr and atomic number (protons in nucleus) 38 and atomic weight 88.1 It is a soft, silver-gray metal, and has physical and chemical properties like to Calcium and Barium. It is available as four stable isotopes ubiquitously (Isotopes are differ in forms of an by number of protons in nucleus but possess a variable number of neutrons.) Strontium-88 is the most dominant among other forms, comprising 83% of natural strontium, where in additional three stable

Chemical Reaction Lab Report The purpose of this experiment is to determine why the distance between beaker A and beaker B increase or decrease the amount of visible vapor. An acid-base neutralization reaction is a chemical reaction between an acid and a base. Evidence of a chemical reaction is that a gas is formed. I noticed that a thicker, denser gas was formed when beaker A and B were right next to each other as opposed to when they were about a meter apart. If an acid-base neutralization reaction

Background Uranium (U) is a chemical element; it is a silvery-white metal. It is one of the heaviest of all the naturally – occurring elements. It was discovered in 1789 by Martin Klaproth, it was named after the planet Uranus, which was discovered eight years earlier. Uranium can be found naturally in small amounts in rocks, air, soil and water. PHYSICAL AND CHEMICAL PROPERTIES Atomic number 92 Atomic mass 238.03 g.mol -1 Density 18.95 g.cm-3 at 20°C Boiling point 3818 °C Melting

communicate information about the use of the modern atomic theory and periodic law to explain the characteristics of atoms and elements. Dalton had come up with the atomic theory which said “that all matter is made of atoms, all atoms of a given element are identical in mass and properties, compounds are combinations of two or more different types of atoms, and a chemical reaction is a rearrangement of atoms.” we learned so much from this theory, we know that the atoms are not indivisible because

composed up of one sodium and one chlorine atom. There are not natural sources of chlorine in its pure element (gas) form. But it is mostly found in the earth's crust along with sodium, potassium, and manganese chlorides. The impacts chlorine has on the environment depends on how long it is the environment and how much of the substance is present. Sometimes chlorine combines to form harmful chemicals that gets into water