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3ai)
maximum number of electron in that can supply the principal energy level of M of an atom
– 2n^2 = 2 (3)^
= 2 x9 = 18 electrons
3aii)
ADVANTAGES
i) It is used for experimental conduction
ii) it increases the calcium in the bones.
DISADVANTAGES
i)it wastes soap while washing with it
ii) it forms stalagmate and stalactite on surfaces which makes it slipery
3aii)
the hardness degree in lime water is higher because it still contain carbonate in high proportion which are element of hardness of water while the water which has been turn milky by carbon (iv) oxide has reduced carbonate
3bi)
i) blood poisoning — CO
ii) acid rain — SO2
iii) blackening of walls of buildings –CO2
3bii)
ii) petrochemicals – petroleum
ii) cellulose –
3biii)
i) diffussion
ii)
3biv)
performing experiment inside tume cupboard and using nose mask to prevent inhalation of fases
3bv)
i) polymerization: this is the process by which light molecule (polymer) with the aid of catalyst
ii) they can depolymerized by catalyst or heat
Solving process is the dissolution ability of sodium hydroxide in a swen solvent form aquos solution
4ai)
i) He
ii) Ne
4aii)
a) Hcl gas
1dii)
-Fractional dutlation
-polymerization
1diii)
Oxidization:This is a process involving the removal or loss of electron
1div)
a)Ag^+
b)Cu(s) – 2L^- ——– Cu^²+
Oxidation half reaction
2Ag(Aq) + 2L^- —-2ag(s)
Reduction half reaction
c)Cu^2+
