6. Which of the following has the electronic arrangement 2,8 ? (1) Ne (2) F (3) S2 (4) Al3+ A. (1) only B. (1) and (3) only C. (2) and (4) only D. (1), (2) and (4) only 7. Element X has an atomic number of 20. It reacts with element Y of atomic number 17, which forms a compound with the formula A. X2Y. B. XY2. C. Y2X. D. YX2. 8. Which of the following combinations will most probably give an ionic compound? A. Group I element and Group 0 element B. Group II element and Group III element C. Group I element and Group VII element D. Group IV element and Group VI element 9. Which of the following is the electron diagram (showing electrons in the outermost shell only) of sodium chloride? B. [Na]+[]] C. D. [Na]+[Cl]2[Na]+ 10. The diagram below shows the electronic structure of a compound formed between element X and element Y. Which of the following combinations is correct