Group VII Properties
Gbogbo ọrọ náà
The Group VII halogens are a striking family of coloured, reactive non-metals: a pale yellow-green gas, a red-brown liquid and a grey-black solid, all sitting in the same column of the periodic table. They are the mirror image of the Group I metals, with a reactivity that falls, rather than rises, as you go down the group.
In this lesson you will learn the appearance of chlorine, bromine and iodine at room temperature, the trends in density and reactivity, and the displacement reactions that prove the order of reactivity. More than that, you will understand why the trend runs the way it does, so you can predict how an unfamiliar halogen will behave and justify it like an examiner.
Ebumnobi
- Describe the Group VII halogens, chlorine, bromine and iodine, as diatomic non-metals with general trends down the group, limited to: (a) increasing density (b) decreasing reactivity.
- State the appearance of the halogens at r.t.p. as: (a) chlorine, a pale yellow-green gas (b) bromine, a red-brown liquid (c) iodine, a grey-black solid.
- Describe and explain the displacement reactions of halogens with other halide ions.
- Predict the properties of other elements in Group VII, 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 VII 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.
- What is the appearance of bromine at room temperature and pressure? A. Pale yellow-green gas B. Red-brown liquid C. Grey-black solid D. Colourless gas Answer: B
- Going down Group VII, the reactivity: A. Increases B. Decreases C. Stays the same D. Becomes zero Answer: B
- Which halogen will displace iodine from potassium iodide solution? A. Iodine itself B. Astatine C. Chlorine D. None of them Answer: C
- Why does iodine not displace chlorine from sodium chloride solution? A. Iodine is a solid B. Iodine is less reactive than chlorine C. Chlorine is a gas D. They do not dissolve Answer: B
- Going down Group VII, the density: A. Increases B. Decreases C. Stays the same D. Becomes negative Answer: A
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 VII Properties? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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