State 3 properties of the halogens (group 7)
Question
State 3 properties of the halogens (group 7)
Solution
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High Reactivity: Halogens are highly reactive. This is due to their electron configuration. They have seven electrons in their outermost shell and need one more to achieve a stable, full outer electron shell. This makes them very reactive as they readily gain an electron to achieve this stability.
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Physical State: Halogens exist in all three states of matter at room temperature. For example, Fluorine (F2) and Chlorine (Cl2) are gases, Bromine (Br2) is a liquid, and Iodine (I2) is a solid.
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Colored Vapors: Halogens produce colored vapors. Fluorine produces a pale yellow gas, chlorine produces a green gas, bromine produces a red-brown liquid which readily evaporates to form a gas, and iodine, when heated, sublimes to form a purple vapor.
Similar Questions
In which group of the periodic table are the halogens found?
The Halogens are part of which Group on the periodic table?AGroup 5BGroup 6CGroup 13DGroup 17
Which of the following is NOT a property of the halogens (group 7 elements)?Low densityLow melting pointConduct electricityReactivity decreases down the group
What is the order of reactivity of the halogens?
Group 7 elements react by gaining an electron in their outer shell. Why does their reactivity decrease as you go down the group?The outer shell becomes further away from the nucleus, so it is easier to gain an electronThe outer shell becomes closer to the nucleus, so it is harder to gain an electronThe outer shell becomes further away from the nucleus, so it is harder to gain an electronThe outer shell becomes closer to the nucleus, so it is easier to gain an electron2Which halogen is a liquid at room temperature?BromineChlorineIodineFluorine3The halogens exist as:Positive ionsNegative ionsMolecules made of pairs of atoms joined by a covalent bondMolecules made of pairs of atoms joined by an ionic bond4A chemical reaction in which a more reactive element takes the compound away from a less reactive element is known as:CombustionReductionDisplacementOxidation5What will happen when chlorine solution is added to sodium iodide solution?Iodine is producedChlorine gas is producedAn explosionNo reaction6Which of the following is a balanced symbol equation for the reaction of chlorine solution with sodium bromide solution?Cl + NaBr → NaCl + BrCl2 + NaBr → NaCl + Br22Cl + 2NaBr → 2NaCl + 2BrCl2 + 2NaBr → 2NaCl + Br2
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