Assignment I.pdf - Assignment I 1(2 physical process(a(b(c...

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Assignment I 1. (2 ) physical process: (a)(b)(c) chemical process: (b)(d)(e) 2. (8 ) p n e R(Si) 14 16 14 T(Y) 39 50 39 X(Cs) 55 78 55 3. (8 ) Symbol 112 Cd 96 Sr 87 Sr 81 Kr 235 U Protons 48 38 38 36 92 Neutrons 64 58 49 45 143 Electrons 48 38 38 36 92 Mass no. 112 96 87 81 235 4. (1 ) M=84.9118*72.15%+86.9092*27.85%=85.4681(amu) 5. (4 ) p e Na + 11 10 Al 3+ 13 10 S 2- 16 18 Br - 35 36 6. (2 ) Metals are solid (with the exception of mercury, a liquid).They are shiny, good conductors of electricity and heat. Also, they are ductile (they can be drawn into thin wires) and malleable (they can be easily
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