Page 135 - Knowledge Organiser Yr8 24-25

Knowledge Base: Science 8.5 Reactivity Year 8
5. Trends in the Periodic Table – Group 1
5.1
List the first 3 elements going down group 1 and give their symbols.
Lithium (Li), Sodium (Na), Potassium (K)
6. Trends in the Periodic Table – Group 7
6.1
List the first 4 elements going down group 7 and give their symbols.
Fluorine (F), Chlorine (Cl), Bromine (Br) , Iodine (I).
5.2 Are group 1 elements metals or non-metals?
Metals. 6.2 What is the name for the group 7 elements?
Halogens.
Non-metals.
5.3
What is the name for group 1 metals and why?
Alkali metals because they react with water to produce an alkaline solution.
5.4
How does the melting and boiling point change as you go down the group?
Melting and boiling point increase.
5.5
Describe the trends in reactivity as you go down group 1.
Reactivity increases as you go down the group.
5.6
Which is the most reactive metal – Lithium, Sodium or Potassium?
Potassium (K)
6.3 Are halogens metals or non-metals?
6.4
When halogens form a compound their ending changes from-ine to ________
-ide
6.5
At room temperature what state are the halogens? Solid, liquid or gas?
Fluorine (F) – gas Chlorine (Cl) – gas Bromine (Br) – liquid Iodine (I) – solid
6.6
How does the melting and boiling point of the halogens change as you go down the group?
Melting and boiling point increases.
6.7
Describe the trends in reactivity as you go down group 7.
Reactivity decreases.
7. Trends in the Periodic Table – Group 0
7.1
List the first 3 elements going down group 0 and give their symbols.
Helium (He), Neon (Ne), Argon (Ar).
7.2
Are group 0 elements metals or non-metals?
Non-metals.
6.8 Which is the most reactive halogen?
6.9 Is Chlorine more reactive than Bromine?
Fluorine (F).
Yes.
6.10
Use your knowledge of the reactivity of halogens to predict which displacement reactions will take place and what their products will be.
a) chlorine + sodium bromide →
b) Bromine + potassium bromide →
a) sodium chloride + bromide
b) No reaction as bromine is less reactive than potassium.
7.3 What is the name for group 0 elements?
Noble gasses.
7.4
What state are group 0 at room temperature?
Gas.
7.5
Do noble gasses form compounds easily?
No. They are extremely unreactive.
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