Periodic table Flashcards
How does electronic configuration relate to an elements position in the periodic table
The number of shells there are show which period the element is in
The number of electrons on the outer shell show which group the element is in
Why do periodic trends in properties of the elements occur, and why do elements in the same group demonstrate similar chemical properties
As elements in the same group need to lose or gain the same number of electrons to create a full outer shell
Be able to draw dot and cross diagram for ionic and covalent compounds
Ionic:
https://edu.rsc.org/infographics/how-to-draw-ionic-bonding-dot-and-cross-diagrams/4016129.article
Covalent: https://www.tutormyself.com/edexcel-igcse-2017chem-146/
What happens when potassium reacts with water
The potassium fizzes vigorously,floats, is shaped into a sphere ball, produces a lilac flame and spits and pops at the end
What happens when sodium reacts with water
it is shaped into a sphere ball, floats, fizzes and dissolves
What happens when lithium reacts with water
floats, fizzes lightly, dissolves and produces a white trail
Explain the trend in reactivity in Group 1 in terms of electronic configuration
the reactivity of the elements increase going down the group as th number of shells increase meaning that the electron/electrons that need to be lost are less attracted to the positive nuclei as it is being shielded by the other shells and is further away from the positive nuclei meaning it is more reactive
Use knowledge of trends in Group 1 to predict the properties of other alkali metals
https://igcse-chemistry-2017.blogspot.com/2017/07/23-use-knowledge-of-trends-in-group-1.html
what is an atom
The smallest particle of a chemical element that can exist
what is an ion
An atom or molecule with net electric charge due to the loss or gain of one or more electrons
What is a molecule
A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction
what are the colours, physical states (at room temperature) and trends in physical properties of the halogens
Flourine - solid - pale yellow
Chlorine - gas - green
Bromine - Liquid - Brown (when gas - orange)
Iodine - solid/gas - grey/purple
Use knowledge of trends in Group 7 to predict the properties of other halogens
Become darker in colour
Melting + boiling point sincrease
Higher density
less reactive
Not needed to click on: https://www.savemyexams.com/igcse/chemistry/edexcel/19/revision-notes/2-inorganic-chemistry/2-2-group-7-halogens/2-2-1-group-7-halogens/
Explain the trend in reactivity in Group 7 in terms of electronic configurations
the reactivity of the elements decrease going down the group as the number of shells increase meaning that the electron/electrons that need to be gained are less attracted to the positive nuclei as it is being shielded by the other shells and is further away from the positive nuclei meaning it is less reactive
How do displacement reactions involving halogens and halides provide evidence for the trend in reactivity in Group 7
as the elements further down the group are displaced by those higher up the group
