RI 02 Atomic Structure Tut (ans to self-check)

-1- Raffles Institution Year 5 H2 Chemistry 2024 Tutorial 2 – Atomic Structure Answers to Self – check Questions 1. Particle No. of protons No. of neutrons No. of electrons 14C 6 8 6 14N3– 7 7 10 15O+ 8 7 7 31P3– 15 16 18 14N 7 7 7 2. (a) Ion that would be deflected the most: 𝐕15 31 3– Note: 𝐕15 31 3– is the ion with highest | 𝑐ℎ𝑎𝑟𝑔𝑒 𝑚𝑎𝑠𝑠 | ratio (or the lightest ion with the highest charge). (b) Ion that would be deflected the least: 𝐙17 35 – Note: 𝐙17 35 – is the ion with the lowest | 𝑐ℎ𝑎𝑟𝑔𝑒 𝑚𝑎𝑠𝑠 | ratio (or the heaviest ion with the smallest charge). 3. (a) Cl (b) Si (c) Cr 1s22s22p63s23p5 1s22s22p63s23p2 1s22s22p63s23p63d54s1 4. Biggest jump occurs between 3rd and 4th electron => in Group 13 => 1s22s22p1