Page 5 - Grab A+ Kertas Model SPM Kimia

2. Rajah 2 menunjukkan pewakilan piawai bagi atom tiga unsur.
Diagram 2 shows a standard representation of atoms of three elements.

40
17Cl
35
17Cl 36 20Ca

Rajah 2 / Diagram 2
Berdasarkan Rajah 2:
Based on Diagram 2:
(a) Nyatakan satu zarah subatom di dalam satu atom.
State one subatomic particle in an atom.

[1 markah / 1 mark]
(b) (i) Apakah bilangan neutron bagi atom Ca?
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What is the number of neutron for atom Ca?

[1 markah / 1 mark]
(ii) Tuliskan susunan elektron bagi atom Ca.
Write the electron arrangement for atom Ca.

[1 markah / 1 mark]
(c) Atom Cl-35 dan Cl-36 adalah isotop. Jelaskan pernyataan ini.
Cl-35 and Cl-36 atoms are isotopes. Explain this statement.

[2 markah / 2 marks]

3. Rajah 3 menunjukkan satu sel Daniel.
Diagram 3 shows a Daniel cell.

V
Zink Kuprum
Zinc Copper

Larutan
Larutan kuprum (II)
zink sulfat sulfat
Zinc sulphate Copper (II)
solution Titian garam sulphate
Salt bridge solution
E Zn (s) / Zn (aq) = –0.76 V E Cu (s) / Cu (aq) = + 0.34 V
0
2+

2+
0
Rajah 3 / Diagram 3
Berdasarkan Rajah 3:
Based on Diagram 3:
(a) Nyatakan perubahan tenaga di dalam sel Daniel.
State the energy change in the Daniel cell.

[1 markah / 1 mark]
(b) Antara elektrod kuprum dan elektrod zink, yang manakah anod?
Between copper electrode and zinc electrode, which one is the anode?

[1 markah / 1 mark]

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