2024 YIJC JC2 H1 CHEM PE P2 Student_s Copy)

©YIJC [Turn over YISHUN INNOVA JUNIOR COLLEGE JC 2 PRELIMINARY EXAMINATION Higher 1 CANDIDATE NAME CG H1 GROUP 1 / 2 / 3 CHEMISTRY Paper 2 Structured and Free Response Questions Candidates answer on the Question Paper. Additional Materials: Data Booklet 8873/02 10 September 2024 2 hours READ THESE INSTRUCTIONS FIRST This document consists of 28 printed pages and 4 blank pages. For Examiner’s Use Section A 1 / 9 2 / 8 3 / 10 4 / 10 5 / 12 6 / 11 Section B 7 or 8 / 20 Penalty units significant figures Total / 80 Write your name and class in the spaces at the top of this page. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. Section A Answer all questions. Section B Answer one question. The use of an approved scientific calculator is expected, where appropriate. The number of marks is given in brackets [ ] at the end of each question or part question.

©YIJC [Turn over 2 Section A Answer all the questions in this section in the spaces provided. 1 (a) A, B and C are three consecutive period 3 elements in the periodic table. D is an isotope of one of the elements. Table 1.1 shows information on the number of protons, neutrons and electrons in species of A, B, C and D. Table 1.1 species protons neutrons electrons A 15 16 15 B2− 16 17 q C 17 18 17 D− 17 17 18 (i) Deduce the value of q. [1] (ii) Identify the element, A, B or C, that is isotopic to D. Explain your answer. [2]

©YIJC [Turn over 3 (b) Element E is a Period 3 element. The first nine successive ionisation energies, in kJ mol−1, of element E are given in Table 1.2. Table 1.2 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 1251 2298 3822 5159 6542 9362 11018 33604 38600 (i) With reference to E, explain what is meant by first ionisation energy of E. [1] (ii) Use the information given in Table 1.2 to deduce the identity of element E. Explain your answer. [2]

©YIJC [Turn over 4 (c) Sulfur is also an element found in the Period 3 of the Periodic Table. (i) Complete the diagram to show the arrangement of electrons in the orbitals of a sulfur atom. ↿⇂