Actually Important stuff Flashcards
Describe metallic bonding [2]
A lattice of positive metal ions in a sea of delocalized electrons
Describe general physical properties of metals [4]
High melting point and boiling point, malleable, ductile, good conductors of heat and electricity.
Describe metallic bonding [2]
A lattice of positive metal ions in a sea of delocalized electrons
Define malleable [1]
Can be bent or hammered into shape
Define ductile [1]
Can be drawn into wires
Define alloy [1]
A mixture of metals with another substance
Explain why an alloy is more useful than pure metal [3]
It is harder (more difficult to scratch) because the other elements disrupt the lattice structure and make it more difficult to remove the layers from the metal
What is brass? [1]
An alloy of copper and zinc
What do we call an alloy that contains iron and other substances? [1]
Steel
Why are nickel and chromium alloyed with iron? [2]
Chromium prevents the steel from rusting, nickel makes it harder
Put these in order of reactivity:
Al, C, Ca, Cu, Fe, H2, K, Mg, Na, Zn [1]
K, Na, Ca, Mg, Al, C, Zn, Fe, H2, Cu
How does the reactivity of a metal relate to how easy it is to extract from its ore? [1]
The more reactive a metal is the more difficult it is to extract from its ore
How does the reactivity of a metal relate to its tendency to form a positive ion? [1]
The more reactive a metal the easier it is to lose its valence electron(s) and form a positive ion
Write a symbol equation for the reaction between magnesium and hydrochloric acid [1]
Mg (s) + 2HCl (aq) —>
