Group 2 Flashcards
Describe the properties of group 2 metals
Low densities
Reducing agents
Describe and explain the trend in reactivity down the group
Increasing reactivity
E added to new shells=Larger atomic radii= e further from nucleus=less attraction
more shells=more shielding
Nuclear charge increases but is outweighed
Less attraction=less energy to remove to become 2+ ion =more reactive
Describe and explain the trend in ionisation energy down the group
Decreases
E added to new shells=Larger atomic radii= e further from nucleus=less attraction
more shells=more shielding
Nuclear charge increases but is outweighed
Less attraction=less energy to remove outer e
Metal + oxygen =?
Metal oxide
Metal+ water =?
Metal hydroxide + hydrogen
Describe what would be seen in the following reaction
Metal+water
Fizzing/ bubbles
Metal disappears
Describe and explain trend in alkalinity down group
More alkali as hydroxide solubility increases
Metal+acid=?
Salt+hydrogen
Describe how a salt is produced
H+ ion replaced with metal ion
Metal oxide + water =?
Metal hydroxide
What metal compounds are bases?
Metal oxides, hydroxide and carbonates
What are the two main uses of group 2 metals?
Medical and agricultural (neutralising acids)
State what metal compounds are used for medical purposes and their names
Magnesium hydroxide (milk of magnesia) Calcium and magnesium carbonates (antacids)
What is used to neutralise acidic fields? What is its other name?
Calcium hydroxide
Lime
What is formed when magnesium hydroxide is used in antacids?
Magnesium chloride and water
