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Periodic Table Notes 1
Periodic Table Notes 1

... _________________________: the pattern of ______________ properties displayed by elements in the periodic table. A unique ______________ for each element that equals the number of ______________ in an atom of that element. Units for atomic mass: ____________________________________ _______________: ...
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Atomic structure and Periodic table revision guide File

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... discovered later but the properties were similar to eka-boron, eka-aluminium and ekasilicon. Noble gases like Helium, Neon, and Argon have been mentioned in his context though they are highly inert and low concentration in our atmosphere. When these gases were discovered they placed a new group with ...
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Periodic Table Trends - Magoffin County Schools
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< 1 ... 15 16 17 18 19 20 21 22 23 ... 80 >

Halogen

The halogens or halogen elements (/ˈhælɵdʒɨn/) are a group in the periodic table consisting of five chemically related elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). The artificially created element 117 (ununseptium) may also be a halogen. In the modern IUPAC nomenclature, this group is known as group 17.The name 'halogen' means 'salt-producing'. When halogens react with metals they produce a wide range of salts, including calcium fluoride, sodium chloride (common salt), silver bromide and potassium iodide. The group of halogens is the only periodic table group that contains elements in three of the four main states of matter at standard temperature and pressure. All of the halogens form acids when bonded to hydrogen. Most halogens are typically produced from minerals or salts. The middle halogens, that is chlorine, bromine and iodine, are often used as disinfectants. Organobromides are the most important class of flame retardants. Elemental halogens are generally toxic.
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