Group 7 (halogens) - Chlorine, Bromine And Iodine
Gbogbo ọrọ náà
Chlorine disinfects swimming pools, bromine was once used in photographic film, and iodine is dabbed onto cuts as an antiseptic. These elements belong to Group 7 of the Periodic Table - the halogens - a family of reactive non-metals whose properties follow striking patterns.
In this lesson you will learn the colours and physical states of chlorine, bromine, and iodine, explore the trends in their physical and chemical properties, and use those trends to predict the behaviour of halogens you have never encountered.
Ebumnobi
- 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
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 7 (halogens) - Chlorine, Bromine And Iodine. 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.
- Going down Group 7, the reactivity of the halogens: A) Increases B) Decreases C) Stays the same D) First increases then decreases Answer: B
- Which halogen is a liquid at room temperature? A) Fluorine B) Chlorine C) Bromine D) Iodine Answer: C
- Chlorine can displace bromine from potassium bromide because: A) Chlorine is less reactive B) Chlorine is more reactive C) Bromine is a gas D) Chlorine is a solid Answer: B
- Going down Group 7, the melting points: A) Decrease B) Increase C) Stay the same D) Fluctuate Answer: B
- How many electrons do halogens have in their outer shell? A) 1 B) 2 C) 7 D) 8 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 7 (halogens) - Chlorine, Bromine And Iodine? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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