Unit 4 - Inorganic Chemistry and the Periodic Table
Resumen
Summary EDEXCEL A LEVEL CHEMISTRY UNIT 4 INORGANIC CHEMISTRY AND THE PERIODIC TABLE
6 vistas 0 veces vendidas
Grado
Unit 4 - Inorganic Chemistry and the Periodic Table
Institución
PEARSON (PEARSON)
I created these notes throughout y12&13 and used them for my A level 2022 exams. I got a grade 9 in GCSE and an A* at a level. These notes were made using the CGP revision guide, edexcel textbook and class notes in order to cover everything in the course. I have also added markschemes from past pap...
Unit 4 - Inorganic Chemistry and the Periodic Table
Todos documentos para esta materia (18)
Vendedor
Seguir
rajreuben
Vista previa del contenido
GROUP 1 ALKALI METALS
26 January 2021
16:58
Physical properties:
● Low density
● Soft
● Low m.p
Ionisation energy decreases as you go down the group.
● More shielding due to more energy shells.
● Larger atomic radius, so outer electrons further from nucleus
● Therefore weaker electrostatic force of attraction between the outer
electrons and the nucleus.
This also explains the increased reactivity down the group, as its easier to lose the
outer electron down the group.
Ionic radius is smaller than atomic radius as they have lost an electron shell.
● More attraction between nucleus and electrons.
Powerful reducing agents as they give up electrons to form +1 ions.
Reactions with water:
2Li(s) + 2H2O(l) ---> 2LiOH(aq) + H2(g)
● With lithium, reaction is steady, giving steady steam and bubbles of hydrogen.
● With sodium, reaction is slightly violent, it melts forming a shiny bead which
skates around the surface of water.
● With potassium, reaction is very violent, the hydrogen catches fire and the
potassium burns with a lilac flame.
Reactions with chlorine form colourless (white) ionic chlorides.
2M(s) + Cl2(g) ---> 2MCl(s)
● All group 1 metals react violently with chlorine.
GROUP 2 ALKALINE EARTH METALS
, 26 January 2021
19:15
Atomic radius increases down the group, as there's an increasing number of electron
shells.
The ionisation energy decreases as you go down the group.
● Increased shielding.
● Greater distance from outer electron and nucleus.
● Weaker force of attraction
Reactivity increases down the group.
Melting point decreases as you go down the group.
● Ions become bigger and less packed together.
● Increased shielding.
● Increased atomic radius, further distance between nucleus and delocalised
electrons.
● Weaker electrostatic force of attraction, weaker metallic bonds.
REACTIONS OF THE GROUP 2 ELEMENTS
26 January 2021
20:31
Group 2 elements are reducing agents as they readily lose electrons to form 2+ ions.
Reactions with oxygen:
2M(s) + O2(g) ---> 2MO(s)
● Mg, burns very brightly with an intense white flame.
● Ca, burns brightly with a red flame.
● Ba, burns in excess air or oxygen with a green flame, forms a peroxide - BaO2
Group 2 metals form white oxides.
Reactions with water:
M(s) + 2H2O (l) ---> M(OH)2(aq) + H2(g)
● Mg, reacts very slowly with cold water. Much more rapidly on heating in
steam to produce MgO.
● Ca, initially calcium hydroxide dissolves, but solubility is low, solution become
saturated and white precipitate appears.
● Ba, reacts fast and is soluble.
Reactions with chlorine:
M(s) + Cl2(g) ---> MCl2(s)
All form white chlorides.
Los beneficios de comprar resúmenes en Stuvia estan en línea:
Garantiza la calidad de los comentarios
Compradores de Stuvia evaluaron más de 700.000 resúmenes. Así estas seguro que compras los mejores documentos!
Compra fácil y rápido
Puedes pagar rápidamente y en una vez con iDeal, tarjeta de crédito o con tu crédito de Stuvia. Sin tener que hacerte miembro.
Enfócate en lo más importante
Tus compañeros escriben los resúmenes. Por eso tienes la seguridad que tienes un resumen actual y confiable.
Así llegas a la conclusión rapidamente!
Preguntas frecuentes
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
100% de satisfacción garantizada: ¿Cómo funciona?
Nuestra garantía de satisfacción le asegura que siempre encontrará un documento de estudio a tu medida. Tu rellenas un formulario y nuestro equipo de atención al cliente se encarga del resto.
Who am I buying this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller rajreuben. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for 7,02 €. You're not tied to anything after your purchase.
