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2.(a) Table 2 shows proton numbers for certain elements in Period 3 of the Periodic Table
of Elements.
Jadual 2 menunjukkan nombor proton bagi unsur-unsur tertentu yang terdapat
dalam Kala 3 Jadual Berkala Unsur.
Element Sodium Magnesium Aluminium Silicon Chlorine Argon
Unsur Natrium Magnesium Aluminium Silikon Klorin Argon
Proton
number 11 12 13 14 17 18
Nombor
proton
Table 2/ Jadual 2
Based on Table 2, answer the following questions.
Berdasarkan Jadual 2, jawab soalan-soalan berikut.
(i) Write the chemical formula for an element which can form a basic oxide when
react with oxygen.
Tuliskan formula kimia bagi satu unsur yang boleh membentuk oksida bes apabila
bertindak balas dengan oksigen.
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[1M]
(ii) Write the electron arrangement for aluminium ion.
Tulis susunan elektron bagi ion aluminium.
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[1M]
(iii) Compare the atomic size between sodium and chlorine. Explain your answer.
Bandingkan saiz atom antara natrium dan klorin. Terangkan jawapan anda.
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[3M]
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