Group 1 (alkali Metals)
Bayani Gaba-gaba
The alkali metals in Group 1 of the periodic table are among the most reactive metals you will study. Drop a small piece of lithium into water and it fizzes gently; do the same with potassium and it bursts into lilac flames. These dramatic reactions follow a clear pattern that reveals how the periodic table organises elements by their behaviour.
In this lesson you will explore how lithium, sodium, and potassium react with water and air, explain the trend in reactivity using electronic configuration, and learn how to predict the properties of alkali metals lower in the group such as rubidium and caesium.
Manufura
- Understand how the similarities in the reactions of these elements with water provide evidence for their recognition as a family of elements
- Understand how the differences between the reactions of these elements with air and water provide evidence for the trend in reactivity in Group 1
- Use knowledge of trends in Group 1 to predict the properties of other alkali metals
Taswirar tunani
An zana wannan batu don ka ga yadda ra'ayoyi ke hadewa.
Bude taswirar tunani a cikin manhaja
Katunan tunawa
Gwaji mai sauri kan abin da ake jarraba a wannan batu.
Yi atisayen wadannan katuna a cikin manhaja
Takardar Darasi
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Nazarin Darasi
Barka da kammala darasi akan Group 1 (alkali Metals). 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.
- What products are formed when sodium reacts with water? A) Sodium oxide and hydrogen B) Sodium hydroxide and hydrogen C) Sodium chloride and water D) Sodium hydroxide and oxygen Answer: B
- Which Group 1 metal is the most reactive? A) Lithium B) Sodium C) Potassium D) Francium Answer: D
- Why does reactivity increase down Group 1? A) The atoms get smaller B) The outer electron is closer to the nucleus C) The outer electron is further from the nucleus and easier to lose D) The metals gain more electrons Answer: C
- What is observed when potassium is added to water? A) It sinks and dissolves slowly B) It floats, a lilac flame is seen and it reacts violently C) It floats and fizzes gently D) No reaction occurs Answer: B
- Which trend is correct for Group 1 metals going down the group? A) Melting point increases B) Reactivity decreases C) Density always decreases D) Melting point decreases Answer: D
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
Periodicity
Classify elements
"Chemistry: Periodicity" 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/18-1-periodicity. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
Wasu ƙungiyoyi ne suka wallafa su ƙarƙashin lasisin buɗe, kuma muna ambaton su yadda suka nema. Hanyoyin suna buɗe shafukansu.
Yi Aikin Tambayoyin Gwaji
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