reactivity series Flashcards
what are the physical properties
- malleable
*ductile
*High melting and boiling point - High density
- good conductor of heat
- good conductor of electricity
*lustrous (shiny)
what is the meaning of malleable
malleable is to form different shapes
what is ductile
can be pulled into long wires
what is the arrangements of atoms is pure metals
the atoms in metals are packed together very closely , there is little empty space for atoms
and
when a force is applied, the layers of atoms in a metal can slide over each other easily
why do atoms in pure metal contain high density
the atoms in metals are packed together very closely , there is little empty space for atoms
why are atoms in pure metals are malleable and ductile
when a force is applied, the layers of atoms in a metal can slide over each other easily
what is the definition of alloys
alloys are a mixture of one or a few other metallic or non-metallic elements
what are pure metals
compromises of identical atoms of the same element, atoms have the same size
how are pure metals arranged
atoms are in ordinary and regular arrangements
what happens if a force is applied to pure metals
if a force is applied, layers of atoms, slide over each other easily
what are the properties of a pure metal
pure metals can be bent or beaten can be bent or beaten into shapes
what is the arrangement of alloy atoms
alloy atom are in disorderly & irregular arrangement
what happens if force is applied to an alloy
when a force is applied on to an alloy, layers of atom wont slide over each other easily
what happens if you try to bend an alloy
alloys cant be bent as they are harder and more difficult to bend than pure metals
what example of alloys
brass
stainless steel
pewter
solder
what is the composition and use of brass
brass -(70%copper, 30%zinc)
to make musical instruments
what is the composition and use of stainless steel
steel
(73% - iron, 18% chromium, 1% carbon)
to make utensils
what is the composition of pewter
pewter
97% tin, 3% copper & antimony
to make souviners
what is the use and composition of solder
solder
50% lead, 50% tin
to join metals
state the abbreviation for the metal reactivity series
please stop calling me a crazy zebra, i think lily hates chewing sweet gums
state the metal reactivity series
potassium, sodium, calcium, magnesium, aluminium, carbon, zinc, iron, tin, lead, hydrogen, copper, silver, gold
state how thereactivity works in the reactivity series
potassium (most reactive)
gold (least reactive)
state what reacts with water
potassium, sodium, calcium, magnesium
state what reacts with steam
potassium, sodium, calcium, magnesium, aluminium, carbon, zinc, iron
state what reacts with HCL
potassium, sodium calcium, magnesium = produce hcl
aluminium, carbon, zinc, iron = steam
tin & lead = react only when in high concentration
what is the general equation for reaction of a metal with steam
metal +steam = metal oxide + hydrogen
what is the reaction btw metal with water
metal + water = metal hydroxide + hydrogen
what are the extraction methods
p - M
= electrolysis of metal compounds
a - l = reduction of metal oxide using carbon (coke)/ hydrogen
h- g = found naturally, uncombined
what is rust
rust is the compound that is hydrated iron (111) oxide.
what are the 2 conditions for rusting
oxygen
water
presence of dissolves salt inc rate of rusting
how to prevent rust
no contact of water and oxygen
what are the physical protections for rusting
coat surface with
- oil, grease, paint, plastic, less reactive metal
how does the layer of physical protection prevent rusting
the layer acts as a barrier, preventing oxygen & water from being in contact with iron
what is the disadvantage of physical barrier
physical barrier my be cracked or scratched
