Trends with the Periodic Table Flashcards
What are group 1 (G1) metals known as?
Alkali metals
G1: What type of density do they have?
Low
G1: What are the first 3 elements in the group less dense than?
Water
G1: What do they form when reacted with non-metals?
Ionic Compounds
G1: What charge does the ion have?
+1
G1: What do they release when reacted with water?
Hydrogen
G1: What colour are the solid ionic compounds they make?
White
G1: What do their ionic compounds do in water?
Dissolve to form colourless solutions
G1: What other thing do they form?
Hydroxides
G1: What do the hydroxides do?
Dissolve, forming ALKALINE solutions
G1: What happens to the reactivity as you go down the group?
Increases
G1: What happens to melting and boiling points as you go down the group?
The get lower
How do group 1 elements compare with transition metals (TM) with melting points?
TM have higher melting points (excluding mercury)
How do group 1 elements compare with transition metals for density?
TM have higher densities
How do group 1 elements compare with transition metals for strength?
TM stronger (and harder)
How do group 1 elements compare with transition metals for reactivity?
TM much less reactive
How do group 1 elements compare with transition metals for reacting with water and oxygen?
TM don’t react as vigorously with water and oxygen
TM: What is odd about some of the ions?
They have different charges, ie iron 2+, iron 3+
TM: What type of compounds do they form?
Coloured
TM: What are they useful as?
Catalysts
What are Group 7 (G7) elements known as?
The Halogens
G7: What do they form when reacted with metals?
Ionic compounds
G7: What’s the charge of a halide ion?
-1
G7: What happens to the reactivity as you go down the group?
It decreases
G7: What happens to melting and boiling points as you go down the group?
They increase
G7: When can a more reactive halogen displace a less reactive one?
From an aqueous solution of its (less reactive ones’) salt
G1: Why does reactivity increase as you go down the group?
There are more electron shells, so electrons are more easily lost
G7: Why does reactivity decrease as you go down the group?
There are more electron shells, so electrons are less easily gained
