Chromium has an atomic number of 24 and is located in the 6th group‚ 4th period of the periodic table of elements. Chromium is a metal and can be identified by its atomic symbol of Cr. Chromium is a hard and brittle metal‚ making it hard to bend as it would break if one tried to do so. Chromium is also a shiny and lustrous metal with a grey color to it. Chromium may also be identified by its high melting and boiling point and can prove to be very useful in everyday lives. Chromium was first discovered
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p-block on the periodic table. Its chemical symbol is Br and its atomic number is 35. Bromine’s atomic weight is 79.904 and has 35 electrons and protons. Elemental bromine exists as a diatomic molecule; Br2. Bromine is the only liquid nonmetallic element. It is a heavy‚ volatile‚ mobile‚ dangerous reddish-brown liquid that vaporizes rapidly at standard temperature and pressures to give an orange vapor that has a strong unpleasant odor. It is one of only two elements on the periodic table that are known
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Science and Technology Homepage Home Search About Contact Bookmark Sort List By Atomic Number Atomic Weight Name Symbol Periodic group‚ Electron configuration Melting point Boiling point Density Ionization energy Abundance in Earth Year of discovery Hebrew Name List of Periodic Table Elements Sorted by Atomic Number Click a column title‚ such as Symbol‚ to sort the table by that item. No. Atomic Weight Name Sym. M.P. ( °C ) B.P. ( °C ) Density* (g/cm3) Earth crust (%)* Discovery (Year)
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you will adopt an element from the periodic table. The element that you choose must have an atomic number from 1- 96. As a proud parent of your element you will create a baby book to remember each stage of your elements life. This project will count a TWO lab grades in science lab (200 pts total). Sources of Information: The periodic table in your book which you can access online Encyclopedia http://periodic.lanl.gov/index.shtml http://www.mii.org/periodic/miiperiodicchart.htm http://www
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Microbiology is the study of microbes‚ which affect almost every aspect of life on the earth. Describe how the table of elements is ordered and discuss four common elements in living organisms. The current periodic table lists 109 elements. It is arranged according to the periodic law; elements are arranged in order of increasing atomic number‚ their physical and chemical properties show a periodic pattern. Elements that have similar properties are arranged in groups or families in vertical columns‚ the
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atoms are joined in a chemical bond. The radius varies with the location of an atom on the atomic chart‚ the type of chemical bond‚ the number of neighbouring atoms (coordination number) and a quantum mechanical property known as spin. On the periodic table of the elements‚ atom size tends to increase when moving down columns‚ but decrease when moving across rows (left to right). When subjected to external fields‚ like an electrical field‚ the shape of an atom may change from that of a sphere
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restaurants. I’m going to tell you about neon’s uses‚ history‚ and facts. The largest use for Neon is in advertising signs. Neon is also used to make high voltage indicators. I’m going to give you the chemical breakdown of neon. Neon is on the periodic table‚ its atomic number is 10‚ protons‚ electrons are 10‚ 10 neutrons and its symbol is Ne. Neon is a noble gas. The period of neon is 2‚ and the group is 18. Neon is very rare on earth even though it’s very common element in the universe. In the
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change. The copper nitrate and ammonuiam hydroxide turned a bluish color so that had a chemical change. (5 points) Score 2. For each metal that participated in a chemical change‚ write the type of metal it is‚ based on your examination of the periodic table. Answer: Ammouniam Vandrate had a chemical change but it turned out to be a transition metal‚ no other metal. The sulfates had more transition atoms going through the chemical‚ more than an original transition atom normally. Doing this showed
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were recorded‚ including the height of foam‚ in a table 7. The process was repeated for the remaining metals Hypothesis: It was predicted that Magnesium would be most reactive metal in the experiment. Background: As the group number decreases‚ reactivity increases. As the period increases‚ the most reactive is towards the bottom. The alkali metals (Group 1 metals) are identified as the most reactive of all present elements on the periodic table. Seeing as potassium and sodium are both found in
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are the ones on the outermost shell. All atoms either want to get rid of these electrons or gain enough to make a full shell. Metals‚ which are on the right side of the periodic table‚ have less than 4 valence electrons. This means they want to get rid of those electrons. Nonmetals‚ which are on the left side of the periodic table‚ have more than 4 valence electrons. These atoms want to gain electrons until they have 8‚ which is a full shell. Metals will always be positive because they are giving
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