Group 1 (alkali Metals) - Lithium, Sodium And Potassium
Akopọ
Drop a pea-sized piece of potassium into water and it bursts into lilac flames, skittering across the surface in seconds. Lithium, by contrast, fizzes gently and takes its time dissolving. Both are Group 1 metals, yet the violence of their reactions is strikingly different, and that difference is the key to understanding chemical families.
In this lesson you will explore how the alkali metals react with water and air, discover why their reactivity increases as you move down the group, and learn to predict the properties of elements you have never even handled, all from their position in the periodic table.
Awọn Afojusun
- 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
- explain the trend in reactivity in Group 1 in terms of electronic configurations
Àwòrán ọpọlọ
A ti ṣe àwòrán kókó yìí kí o lè rí bí àwọn èrò ṣe so pọ̀.
Ṣí àwòrán ọpọlọ nínú áàpù
Káàdì ìrántí
Ìdánrawò kíákíá lórí ohun tí wọ́n ń dán wò nínú kókó yìí.
Ṣe ìdánrawò káàdì wọ̀nyí nínú áàpù
Akọ̀wé Ẹ̀kọ́
Àkọsílẹ̀ Ẹ̀kọ́ Pípé wà lórí Ohun Èlò Green Bridge
Gba ohun èlò Green Bridge CBT sórí fóònù tàbí kọ̀mpútà rẹ fún gbogbo ilé ìkàwé IGCSE: ìwé ìdánwò àtijọ́, ìlànà ìdíwọ̀n, àwòrán èrò, káàdì ìkẹ́kọ̀ọ́ àti ẹ̀kọ́ ohùn.
Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Group 1 (alkali Metals) - Lithium, Sodium And Potassium. 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 of the following is the most reactive alkali metal? A) Lithium B) Sodium C) Potassium D) Francium Answer: D
- What is produced when sodium reacts with water? A) Sodium oxide and hydrogen B) Sodium hydroxide and oxygen C) Sodium hydroxide and hydrogen D) Sodium chloride and hydrogen Answer: C
- The alkali metals become more reactive going down the group because: A) They have more protons B) The outer electron is closer to the nucleus C) The outer electron is further from the nucleus and easier to lose D) They have more electrons in the outer shell Answer: C
- Which Group 1 metal floats on water but does NOT catch fire? A) Potassium B) Rubidium C) Sodium D) Caesium Answer: C
- What type of solution is formed when a Group 1 metal reacts with water? A) Acidic B) Neutral C) Alkaline D) Saturated Answer: C
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ẹ̀kọ́ síwájú láti àwọn orísun ṣíṣí
-
Abala ìwé ẹ̀kọ́
Periodicity
Classify elements
"Chemistry: Periodicity" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/chemistry/pages/18-1-periodicity. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
-
Abala ìwé ẹ̀kọ́
Periodic Variations in Element Properties
Describe and explain the observed trends in atomic size, ionization energy, and electron affinity of the elements
"Chemistry: Periodic Variations in Element Properties" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/chemistry/pages/6-5-periodic-variations-in-element-properties. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
Àwọn àjọ mìíràn ló tẹ̀ wọ́n jáde lábẹ́ ìwé àṣẹ ṣíṣí, a sì dá wọn lọ́lá bí wọ́n ṣe béèrè. Àwọn ìjápọ̀ ń ṣí ojú òpó wọn.
Ṣe Adaṣe Awọn Ibeere Idanwo Adaṣe
Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Group 1 (alkali Metals) - Lithium, Sodium And Potassium? Ṣe igbasilẹ ohun elo Green Bridge CBT lati wọle si awọn ibeere idanwo adaṣe ati awọn ayẹwo adaṣe kikun fun koko-ọrọ yii.
Ṣe igbasilẹ ohun elo naa lori Google Playstore
Gbogbo ohun ti o nilo lati ṣe dara julọ ninu JAMB, WAEC ati NECO.
