Group 7 (halogens) – Chlorine, Bromine And Iodine
Akopọ
Open a bottle of bleach and the sharp smell reaching your nose is chlorine, one of the halogens. These five reactive non-metals sit in Group 7 of the periodic table, and despite ranging from a pale yellow gas to a dark solid, they form a tight chemical family with predictable patterns.
In this lesson you will compare the physical properties and colours of chlorine, bromine and iodine, investigate displacement reactions that prove their reactivity order, and explain why reactivity decreases down the group using electronic configurations.
Awọn Afojusun
- 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
- understand how displacement reactions involving halogens and halides provide evidence for the trend in reactivity in Group 7
- explain the trend in reactivity in Group 7 in terms of electronic configurations
Akọ̀wé Ẹ̀kọ́
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Group 7 (halogens) – Chlorine, Bromine And Iodine. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- Which halogen is a liquid at room temperature? A) Fluorine B) Chlorine C) Bromine D) Iodine Answer: C
- What happens when bromine water is added to potassium chloride solution? A) The solution turns brown B) The solution turns orange C) Chlorine gas is released D) No reaction occurs Answer: D
- The reactivity of the halogens decreases down the group because: A) The atoms get smaller B) The outer shell is further from the nucleus, making it harder to gain an electron C) They lose electrons more easily D) They have fewer protons Answer: B
- Which of the following correctly describes the trend in boiling point down Group 7? A) Decreases B) Stays the same C) Increases D) Increases then decreases Answer: C
- Chlorine can displace bromine from potassium bromide solution because: A) Chlorine is less reactive than bromine B) Chlorine is more reactive than bromine C) Bromine is a gas D) Potassium is more reactive than chlorine Answer: B
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ṣe Adaṣe Awọn Ibeere Idanwo Adaṣe
Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Group 7 (halogens) – Chlorine, Bromine And Iodine? Ṣe igbasilẹ ohun elo Green Bridge CBT lati wọle si awọn ibeere idanwo adaṣe ati awọn ayẹwo adaṣe kikun fun koko-ọrọ yii.
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