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chemistry > metals > Flashcards

metals Flashcards

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1
Q

where do metals occur

A

occurs in metallic elements and alloys

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2
Q

structure of metals

A

a lattice of cation and anion surrounded by delocalized e-s held together by electrostatic forces

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3
Q

how do metals react

A

by losing electrons to form cations. the less energy required for this the more reactive the metal is.

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4
Q

the more protons ….

A

the more energy is energy to lose electrons

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5
Q

the more electronsit needs to lose…

A

the more energy it takes to lose them

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6
Q

the more occupied energy levels…

A

the less energy it takes to lose the electrons

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7
Q

observations in displacement

A

temp. increase
solid changes colours well as solution

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8
Q

extraction

A

a chemical reaction to produce an element from its compound

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9
Q

what are metals present as?

A

ores, which have formed over billions of years.
ores are mixtures of compounds with a high % of metallic elements

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10
Q

the reactivity series

A

K
Na
Li
Ca
Mg
Al
Zn
Fe
Cu
Ag
Au

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11
Q

electrolysis

A

uses electrical energy to decompose a compound

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12
Q

iron ore

A

haemotite

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13
Q

reaction 1 in extraction of FE

A

C + O2 —> CO2

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14
Q

reaction 2 in extraction of Fe

A

CO2 + C —–> 2CO

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15
Q

reaction 3 in extraction of Fe

A

3CO + Fe2O3 –> 2Fe + 3CO2

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16
Q

removing impurities

A

CaCO3 —> CaO + CO2
CaO + SiO —> CaSiO3
used for roads

17
Q

metal oxide properties

A

insoluble in water, but gp 1 reacts
high mpt
conducts electricity when liquid or aqeuos

18
Q

how can you extract Cu and Ag

A

through decomposition
2CuO —> 2Cu + O2

19
Q

how can you extract gp1-3

A

thorugh electrolysis
cations gather at negative cathode, anions at positive anode

20
Q

how can you extract transistion metals

A

through carbon displacement
2ZnO + C —> 2Zn + CO2

21
Q

alloy

A

a mixture which contains a metal and at least one other substance
ions of different sizes disrupt the lattice in an alloy. making the metal harder since the ions cannot slide as easily

22
Q

reactivity of metals depends on

A

no. of protons- more protons more reactive
no. of electrons needing to be lost- more electrons the lower the reactivity
no. of occupied energy levels- more levels the higher the reactivity

chemistry (10 decks)

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