30 most common elemnets by Lizeth Machado https://padlet.com/305584/ls62l66gz2wu Made with fortitude en-us 2017-04-25 20:41:28 UTC 2025-11-04 01:00:21 UTC hello@padlet.com H-Hydrogen-Atomic 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168235158 Number 1
Hydrogen i a present in all organic compounds
]]> 2017-04-25 20:49:13 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168235158 oxygen 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168236323 number 8
 Oxygen is a chemical element with symbol O and atomic number 8. It is a member of the chalcogen group on the periodic table and is a highly reactive nonmetal and oxidizing agent that readily forms oxides


]]> 2017-04-25 20:56:04 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168236323 alimnium 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168236794 number 13 
Pure aluminium is a silvery-white metal with many desirable characteristics. It is light, nontoxic
]]> 2017-04-25 20:58:56 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168236794 Actinium 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168237047 number 89
Actinium is dangerously radioactive. The chemical behaviour of actinium is similar to that of the rare earths, particularly lanthanum.
]]> 2017-04-25 21:00:38 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168237047 germanium 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168237329 number 32 
Germanium is a gray-white semi-metal, and in its pure state is crystalline and brittle, retaining its lustre in air at room temperature.
]]> 2017-04-25 21:02:27 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168237329 Calcium 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168237575 number 20 
Calcium as the element is a grey silvery metal. The metal is rather hard. Calcium is an essential constituent of leaves, bones, teeth, and shells.
]]> 2017-04-25 21:03:51 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168237575 Beryllium 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168237824 number 4 
Beryllium is a Group 2 (IIA) element. It is a metal and has a high melting point. At ordinary
 temperatures, beryllium resists oxidation in air
]]> 2017-04-25 21:05:16 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168237824 Arsenic 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168237989 number 33
Elemental arsenic occurs in two solid modifications: yellow, and grey or metallic, with specific gravities of 1.97, and 5.73, respectively.


]]> 2017-04-25 21:06:39 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168237989 Argon 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168238163 number 18 
Argon is a colourless and odourless gas present to a very small extent in the atmosphere. Argon is very inert (indeed it is referred to as one of the noble gases) and is not known to form true chemical compounds
]]> 2017-04-25 21:08:02 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168238163 Californium 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168238331 number 98 
Californium is a radioactive rare earth metal named after the state of California and the University of California (USA). Californium-252 is a strong neutron emitter and one microgram emits 170 million neutrons per minute
]]> 2017-04-25 21:09:14 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168238331 caesium 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168498420 number 55
Caesium is known as cesium in the USA.

The metal is characterised by a spectrum containing two bright lines in the blue
]]> 2017-04-26 20:36:51 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168498420 chromium 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168498762 number 24
Chromium is steel-gray, lustrous, hard, metallic, and takes a high polish. Its compounds are toxic. It is found as chromite ore. Siberian red lead (crocoite, PrCrO4) is a chromium ore prized as a red pigment for oil paints.
]]> 2017-04-26 20:38:47 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168498762 Antinomy 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168498929 number 51
Metallic antimony is an extremely brittle metal of a flaky, crystalline texture. It is bluish white and has a metallic lustre
]]> 2017-04-26 20:39:49 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168498929 Barium 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168499221 number 56
Barium is a metallic element, soft, and when pure is silvery white like lead. The metal oxidises very easily and it reacts with water or alcohol
]]> 2017-04-26 20:41:30 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168499221 Americium 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168499358 number 95
Americium appears to be more malleable than uranium or neptunium and americium tarnishes slowly in dry air at room temperature. Americium is a radioactive rare earth metal which must be handled with care to avoid contact, since it is a heavy α and γ emitter


]]> 2017-04-26 20:42:18 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168499358 Astatine 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168499631 number 85 
he longest-lived isotope, 210At, has a half-life of only 8.3 hours. There are about 20 isotopes known, all of which are radioactive. Astatine is a halogen and possibly accumulates in the thyroid like iodine 
]]> 2017-04-26 20:44:04 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168499631 cerium 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168499841 number 58
Metallic cerium is prepared by reduction techniques, such as by reducing cerous fluoride with calcium, or by electrolysis of molten cerous chloride or other cerous halides.
]]> 2017-04-26 20:45:41 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168499841 lead 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168499988 number 82
lead is a bluish-white lustrous metal. It is very soft, highly malleable, ductile, and a relatively poor conductor of electricity. It is very resistant to corrosion but tarnishes upon exposure to air. Lead pipes bearing the insignia of Roman emperors, used as drains from the baths, are still in service
]]> 2017-04-26 20:46:47 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168499988 fermium 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168500088 number 100
Fermium's chemical properties are largely unknown. Fermium is a radioactive rare earth metal. The longest living isotope is is 257Fm with a half-life of 80 days. It is of no commercial importance.
]]> 2017-04-26 20:47:40 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168500088 Einsteinium 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168500271 number 99
Einsteinium is radioactive rare earth metal named after Albert Einstein. It is of no commercial importance and only a few of its compounds are known.
]]> 2017-04-26 20:49:01 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168500271 lodine 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168500393 number 53
Iodine is a bluish-black, lustrous solid. It volatilises at ambient temperatures into a pretty blue-violet gas with an irritating odour.
]]> 2017-04-26 20:50:04 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168500393 nitrogen 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168500533 number 7
nitrogen is a Group 15 element. Nitrogen makes up about 78% of the atmosphere by volume but the atmosphere of Mars contains less than 3% nitrogen. The element seemed so inert that Lavoisier named it azote, meaning "without life".
]]> 2017-04-26 20:51:07 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168500533 carbon 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168500707 number 6
Carbon is a Group 14 element and is distributed very widely in nature. It is found in abundance in the sun, stars, comets, and atmospheres of most planets. Carbon is present as carbon dioxide in the atmosphere and dissolved in all natural waters.
]]> 2017-04-26 20:52:03 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168500707 Bismuth 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168500805 number 83 
Bismuth is a white, crystalline, brittle metal with a pinkish tinge. Bismuth is the most diamagnetic of all metals, and the thermal conductivity is lower than any metal, except mercury. It has a high electrical resistance, and has the highest
]]> 2017-04-26 20:52:50 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168500805 iron 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168500938 number 26 
iron is a relatively abundant element in the universe. It is found in the sun and many types of stars in considerable quantity.
]]> 2017-04-26 20:53:47 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168500938 Argon 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168501064 number 18
Argon is a colourless and odourless gas present to a very small extent in the atmosphere. Argon is very inert (indeed it is referred to as one of the noble gases) and is not known to form true chemical compounds
]]> 2017-04-26 20:54:58 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168501064 boron 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168501178 number 5
Boron is a Group 13 element that has properties which are borderline between metals and non-metals (semimetallic)
]]> 2017-04-26 20:55:54 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168501178 silver 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168501269 number 47 
Silver is somewhat rare and expensive, although not as expensive as gold. Slag dumps in Asia Minor and on islands in the Aegean Sea indicate that man learned to separate silver from lead as early as 3000 B.C.
]]> 2017-04-26 20:56:40 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168501269 helium 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168501358 number 2
Helium is one of the so-called noble gases. Helium gas is an unreactive, colourless, and odourless monoatomic gas. Helium is available in pressurised tanks.


]]> 2017-04-26 20:57:28 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168501358 neon 305584 https://padlet.com/305584/ls62l66gz2wu/wish/168501505 number 10
Neon is a very inert element. Neon forms an unstable hydrate. In a vacuum discharge tube, neon glows reddish orange
]]> 2017-04-26 20:58:44 UTC https://padlet.com/305584/ls62l66gz2wu/wish/168501505