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potassium (cold water)
reacts explosively
darts around and sizzles on the surface of water
effervescence of a colourless odourless gas that extinguishes a lighted spring with ‘pop’ sound
sodium (cold water)
reacts violently
darts around and sizzles on surface of water
effervescence of a colourless odourless gas that extinguishes lighted splint with ‘pop’ sound
calcium (cold water)
reacts readily
darts around and sizzles on surface of water
effervescence of a colourless odourless gas that extinguishes lighted splint with ‘pop’ sound
magnesium (cold water)
very slow reaction
few bubbles of colourless odourless gas the extinguishes a lighted splint with a ‘pop’ sound
copper, silver, zinc, lead, iron
no reaction. rusting occurs for iron due to presence of air and water
potassium, sodium, calcium (steam)
reactions are too explosive
magnesium (steam)
hot Mg reacts violently with steam
bright while glow produced, white powder (MgO) produced
zinc (steam)
hot grey zinc reacts readily in steam to form yellow solid (ZnO) that turns white when cooled
iron (steam)
red hot iron reacts slowly to form black solid (Fe3O4)
lead, copper, silver (steam)
no reaction