10 - Metals Flashcards
(17 cards)
State the properties of metals.
- Conducts heat and electricity
- Malleable and ductile
- High melting & boiling points
- High densities
Metal + Acid → _________.
Salt + Hydrogen
What is Corrosion?
Corrosion is a process where metals and alloys are chemically attacked by oxygen, water or any other substances in their immediate environment.
Corrosion of _______ is called Rusting.
iron/steel
State the word equation for Rusting.
Iron + Water + Oxygen → Hydrated Iron (III) Oxide
Methods to prevent rusting:
- Painting
- Oiling/Greasing
- Coating with Plastic
- Galvanizing
- Sacrificial Protection
Why are more reactive metals more reactive?
They have higher tendency to lose outer electrons to form positive ions.
What prevents Aluminum from corroding further?
The protective oxide coating that forms on the surface of the Aluminum when it reacts with Oxygen. This prevents more inner Aluminum from being corroded.
Why are Aluminum used in air crafts?
Because they have low density.
Sodium and _________ are stored under _____ to avoid _________ contact.
Potassium, oil, air/water
Metal + Oxygen → ____________.
Metal Oxides
Metal + Cold Water → ____________.
Metal Hydroxide + Hydrogen
Metal + Steam → ____________.
Metal Oxide + Hydrogen
In _________ reactions, the _____ reactive metal displaces the ____ reactive metal from its ___________.
Displacement, more, less, compound.
What are Alloys?
Alloys are a mixture of metals with other elements.
