Group I Properties
Gbogbo ọrọ náà
Drop a small piece of sodium into water and it fizzes, skates across the surface and may burst into flame. Potassium does the same, only more violently. These are the Group I alkali metals, a family so reactive that they must be stored under oil, and their behaviour changes in a clear, predictable way as you move down the group.
In this lesson you will learn the physical properties of lithium, sodium and potassium, the three trends you must know going down Group I, and the reasoning behind them. By the end you should be able to predict the properties of metals further down the group and justify your prediction.
Ebumnobi
- [Core] Describe the Group I alkali metals, lithium, sodium and potassium, as relatively soft metals with general trends down the group, limited to: (a) decreasing melting point (b) increasing density (c) increasing reactivity with water
- [Supplement] Predict the properties of other elements in Group I, given information about the elements
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 I Properties. 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.
- Which is a property of the Group I alkali metals? A. They are very hard B. They are relatively soft C. They are unreactive D. They are non-metals Answer: B
- Going down Group I, the melting point: A. Increases B. Decreases C. Stays the same D. First rises then falls Answer: B
- Going down Group I, the reactivity: A. Increases B. Decreases C. Stays the same D. Is zero Answer: A
- Going down Group I, the density: A. Increases B. Decreases C. Stays the same D. Becomes negative Answer: A
- Which alkali metal reacts most vigorously with water? A. Lithium B. Sodium C. Potassium D. They are all equal Answer: C
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 I Properties? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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