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15 cards from this deck
Due to oxide layer formation
To prevent reaction with oxygen and moisture in air
They have low density
111 electron
They bond by losing their 111 outer electron
Reactivity increases
Outer electron further from nucleus, more easily lost
Density increases
Melting point decreases
Metal oxide
Metal hydroxide + hydrogen
Hydrogen
Floats, moves, and fizzes
Forms a ball shape
Lilac flame
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