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... halogens? All halogens have seven electrons in their outer shell. This means that: They can easily obtain a full outer shell by gaining one electron. They all gain an electron in reactions to form negative ions with a -1 charge. ...
... halogens? All halogens have seven electrons in their outer shell. This means that: They can easily obtain a full outer shell by gaining one electron. They all gain an electron in reactions to form negative ions with a -1 charge. ...
Cambridge International Examinations Cambridge
... Describe a chemical test to show that the fat is unsaturated. name of reagent ................................................................................................................ result of test .............................................................................................. ...
... Describe a chemical test to show that the fat is unsaturated. name of reagent ................................................................................................................ result of test .............................................................................................. ...
Group 17: The Halogens - Chemwiki
... 5. Astatine - Astatine is a radioactive element with an atomic number of 85 and symbol At. Its possible oxidation states include: -1, +1, 3, 5 and 7. It is the only halogen that is not a diatomic molecule and it appears as a black, metallic solid at room temperature. Astatine is a very rare element ...
... 5. Astatine - Astatine is a radioactive element with an atomic number of 85 and symbol At. Its possible oxidation states include: -1, +1, 3, 5 and 7. It is the only halogen that is not a diatomic molecule and it appears as a black, metallic solid at room temperature. Astatine is a very rare element ...
Halogens - Cronodon
... Group 7: The Halogens Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I-) and Astatine (At). The halogens are very reactive elements and so, just like the Group 2 metals, they are not found in nature in elemental form. Instead they occur as halide ions (fluoride (F–), chloride (Cl–), bromide (Br– ...
... Group 7: The Halogens Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I-) and Astatine (At). The halogens are very reactive elements and so, just like the Group 2 metals, they are not found in nature in elemental form. Instead they occur as halide ions (fluoride (F–), chloride (Cl–), bromide (Br– ...