Hydrogen is recognized as the simplest and lightest chemical element in the periodic table; even though it is identified as one of the top elements in abundance in the world (consisting of 0.9 percent of the total mass on earth)‚ it is considered to be the most abundant element in the entire universe. It is a gaseous element with the atomic symbol being H. It is usually categorized under the first group of the periodic table known as the alkali metals. It contains only one electron that revolves
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Energy‚ often in the state of heat‚ is involved in chemical reactions and phases changes. Changes in energy‚ can translate in temperature differentiations. In such a case‚ energy is transferred as heat. The quantity of heat exerted in a reaction referred to as (joules) can be identified through the following equation: Heat Exerted= (Mass of Sample) x (Specific Heat) x (Change in Temperature) q=msΔT Within a calorimeter is where the reactions within this lab take place. A calorimeter allows the
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the individual elements. Although elements such as gold‚ silver‚ tin‚ copper‚ lead and mercury have been known since antiquity‚ the first scientific discovery of an element occurred in 1649 when Hennig Brand discovered phosphorous. During the next 200 years‚ a vast body of knowledge concerning the properties of elements and their compounds was acquired by chemists (a 1790 article on the elements). By 1869‚ a total of 63 elements had been discovered. As the number of known elements grew‚ scientists
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Rubidium is a chemical element that was discovered in 1861 by Robert Bunsen and Gustav Kirchhoff‚ in Heidelberg‚ Germany through a scientific process of flame spectroscopy. During the process‚ Kirchhoff and Heidelberg noticed bright red lines in its emission spectrum which caused them to choose the name Rubidium derived from the Latin word rubidus‚ meaning "deep red". Rubidium is a chemical element with symbol Rb and atomic number 37 and an atomic mass of 85.4678. Rubidium is a soft‚ silvery-white
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is a solid material which is either an element‚ a compound or an alloy. Metals share some common properties like being typically hard and shiny‚ and that metals are good electrical and thermal conductors. They are generally malleable‚ fusible and ductile. In a periodic table of elements‚ there are six groups of metals and two of them are the most common. It is the Alkali Metals and the Alkaline Earth Metals. Alkali metals comprise the group 1 elements. They are similarly shiny‚ soft and highly
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a.O Select the letter of the best atoner below. 1 Which of the following is the correct Lewis diagram for corbon? Knowledge and Understanding Chapter 1 B : Na Chapter 1 Elements and the Penindic Table. MHR 45 Si: Lewis diagrams. Drase rhe correct Lewis diagram for each element. a. .• b. . c. 9. Explain what is incorrect about each of the folloss’ing d. the attractive forces among the protons are less than the repulsive forces among the neutrons a. the repulsive
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atomic weight of Vanadium is 50.942 grams per one mole. The electron configuration is 1S2 2S2 2P6 3S2 3P6 4S2 3D3 and the noble gas notation is [Ar] 4S2 3D3. Vanadium is located in group 5B‚ in the transition metals‚ on the periodic table of the elements. Also‚ included in this group are niobium [atomic number 41 with an atomic weight of 92.9064 grams per mole]‚ tantalum [atomic number 73 with an atomic weight of 180.948 grams per mole]‚ and dubnium [atomic number 105 with an atomic weight of 262
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periodic table is widely renowned in the history of chemical science. Mendeleev was the creator of the periodic table; arranging 63 known elements in order of their atomic mass. His discovery made a significant impact in the development of the periodic table as it set the foundation for further progress to occur in the future. Dmitri Mendeleev anticipated the existence of new elements to be discovered‚ therefore leaving gaps in the ascending order of elements. Mendeleev was the notable discoverer of isotopes
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Mercury is a metallic element that is naturally found in rocks within the earth’s crust. It is dispersed into the environment in various ways such as soil‚ weathering of rocks‚ volcanoes‚ mining coal combustion‚ power plants‚ municipal waste and even the products used in the household or for health. Since mercury naturally occurs in the environment‚ it can exist in several forms and there are three main forms it takes on; there is Elemental mercury‚ organic mercury and inorganic mercury and each
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(METAL) Iron is a chemical element with the symbol Fe (from Latin: ferrum) and atomic number 26. It is a metal in the first transition series. It is the most common element (by mass) forming the planet Earth as a whole‚ forming much of Earth’s outer and inner core. It is the fourth most common element in the Earth’s crust. Iron’s very common presence in rocky planets like Earth is due to its abundant production as a result of fusion in high-mass stars‚ Like other group 8 elements‚ iron exists in
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