Group 1 (alkali Metals)
Gbogbo ọrọ náà
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.
Ebumnobi
- 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
Akọmọ Ojú-ẹkọ
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ayẹwo Ẹkọ
Ekele diri gi maka imecha ihe karịrị na Group 1 (alkali Metals). Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- 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
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Àwọn Ìwé Tó Dáa Láti Kà
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Group 1 (alkali Metals)? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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