Group 7 (halogens) - Chlorine, Bromine And Iodine
Bayani Gaba-gaba
Open a bottle of bleach and the sharp smell reaching your nose is chlorine, one of the halogens. These five reactive non-metals sit in Group 7 of the periodic table, and despite ranging from a pale yellow gas to a dark solid, they form a tight chemical family with predictable patterns.
In this lesson you will compare the physical properties and colours of chlorine, bromine and iodine, investigate displacement reactions that prove their reactivity order, and explain why reactivity decreases down the group using electronic configurations.
Manufura
- know the colours, physical states (at room temperature) and trends in physical properties of these elements
- use knowledge of trends in Group 7 to predict the properties of other halogens
- understand how displacement reactions involving halogens and halides provide evidence for the trend in reactivity in Group 7
- explain the trend in reactivity in Group 7 in terms of electronic configurations
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Nazarin Darasi
Barka da kammala darasi akan Group 7 (halogens) - Chlorine, Bromine And Iodine. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- Which halogen is a liquid at room temperature? A) Fluorine B) Chlorine C) Bromine D) Iodine Answer: C
- What happens when bromine water is added to potassium chloride solution? A) The solution turns brown B) The solution turns orange C) Chlorine gas is released D) No reaction occurs Answer: D
- The reactivity of the halogens decreases down the group because: A) The atoms get smaller B) The outer shell is further from the nucleus, making it harder to gain an electron C) They lose electrons more easily D) They have fewer protons Answer: B
- Which of the following correctly describes the trend in boiling point down Group 7? A) Decreases B) Stays the same C) Increases D) Increases then decreases Answer: C
- Chlorine can displace bromine from potassium bromide solution because: A) Chlorine is less reactive than bromine B) Chlorine is more reactive than bromine C) Bromine is a gas D) Potassium is more reactive than chlorine Answer: B
Yi aikin wadannan tambayoyi a cikin manhaja
Yi aikin wadannan tambayoyi a cikin manhaja
Littattafan da ake ba da shawarar karantawa
Ƙarin koyo daga tushe na buɗe
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Sashen littafi
Occurrence, Preparation, and Properties of Halogens
Describe the preparation, properties, and uses of halogens
"Chemistry: Occurrence, Preparation, and Properties of Halogens" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/chemistry/pages/18-11-occurrence-preparation-and-properties-of-halogens. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
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