Calcium is essential to the human body it is absorbed and used for a number of processes, including strengthening bones. A familiar example of an element that you must take in is calcium (Ca). While your body can assemble many of the chemical compounds needed for life from their constituent elements, it cannot make elements.
An element is a pure substance that is distinguished from all other matter by the fact that it cannot be created or broken down by ordinary chemical means. Elements and CompoundsĪll matter in the natural world is composed of one or more of the 92 fundamental substances called elements. A piece of cheese that weighs a pound on Earth weighs only a few ounces on the moon. In other words, weight is variable, and is influenced by gravity.
An object of a certain mass weighs less on the moon, for example, than it does on Earth because the gravity of the moon is less than that of Earth. Where gravity strongly pulls on an object’s mass its weight is greater than it is where gravity is less strong. An object’s weight, on the other hand, is its mass as affected by the pull of gravity. An object’s mass is the amount of matter contained in the object, and the object’s mass is the same whether that object is on Earth or in the zero-gravity environment of outer space. An object’s mass and its weight are related concepts, but not quite the same. Scientists define matter as anything that occupies space and has mass. The substance of the universe-from a grain of sand to a star-is called matter. Explain how electrons occupy electron shells and their contribution to an atom’s relative stability.Identify the key distinction between isotopes of the same element.Distinguish between atomic number and mass number.Discuss the relationships between matter, mass, elements, compounds, atoms, and subatomic particles.1995 - 2023.By the end of this section, you will be able to: Periodic Table of Elements - Cesium - Cs. If you need to cite this page, you can copy this text: This database focuses on the most common chemical compounds used in the home and industry. Molar mass calculations are explained and there is a JavaScript calculator to aid calculations. Molar Mass Calculations and Javascript Calculator.Introduces stoichiometry and explains the differences between molarity, molality and normality. Related ResourcesĪnswers many questions regarding the structure of atoms. Common Chemical Compounds of Cesium ReferencesĪ list of reference sources used to compile the data provided on our periodic table of elements can be found on the main periodic table page.Additional Notes: Cesium can have very serious effects on the body if taken in excess.Also used in photoelectric cells, atomic clocks, infared lamps. Since it ionizes readily, it is used as an ion rocket motor propellant. Uses of Cesium: Used as a 'getter' to remove air traces in vacuum tubes.Primary mining areas are in Bernic Lake (Manitoba, Canada), Bikita (Zimbabwe) and South-West Africa. World production is around 20 tons per year. Sources of Cesium: Found in pollucite and as trace in lepidolite.Name Origin: Latin: caesius (sky blue) its salts turn flames blue.70kg human: 6 mg Who / Where / When / How Note: this data represents naturally occuring levels of elements in the typical human, it DOES NOT represent recommended daily allowances. Vapor Pressure 2.5kPa Regulatory / Health.Enthalpy of Atomization: 78.2 kJ/mole 25☌.Description: Soft light silvery-white alkali metal.Conductivity Electrical: 0.0489 10 6/cm Ω.Coefficient of lineal thermal expansion/K -1: 97E -6.Valence Electron Potential (-eV): 8.62 Physical Properties of Cesium.Electronegativity: 0.79 (Pauling) 0.86 (Allrod Rochow).Electrochemical Equivalent: 4.9587g/amp-hr.Valence Electrons: 6s 1 Electron Dot Model.Number of Neutrons (most common/stable nuclide): 78.Number of Electrons (with no charge): 55.Electrons per Energy Level: 2,8,18,18,8,1 Shell Model.Electron Configuration: 1s 2 2s 2p 6 3s 2p 6d 10 4s 2p 6d 10 5s 2p 6 6s 1.Crystal Structure: Cubic body centered.Cross Section (Thermal Neutron Capture)σ a/ barns : 29.Swedish: Cesium Atomic Structure of Cesium.Series: Alkali Metals Cesium's Name in Other Languages.Common Chemical Compounds of Cesium Overview of Cesium.In addition technical terms are linked to their definitions and the menu contains links to related articles that are a great aid in one's studies. Common chemical compounds are also provided for many elements. Skip to site menu on this page Periodic Table of Elements Element Cesium - CsĬomprehensive data on the chemical element Cesium is provided on this page including scores of properties, element names in many languages, most known nuclides of Cesium.
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