2023-2024 - Chemistry Exam Review Verified Questions And Answers 2024 Latest Version

Bohr's Experiment {Ans: } - electrons can jump to higher energy levels if it absorbs enough energy - more energy = ability to jump to further away from nucleus - electrons can jump to a lower energy level when it releases energy in the form of electromagnetic radiation - energy may be visible as different colours of light - each element only emits certain colours, so electrons can only exist at specific energy levelsGround state {Ans: } when an electron is in the lowest energy level it can occupyOctet rule {Ans: } Atoms can lose, gain, or share eletrons to achieve 8 valence electrons (become stable).Ion {Ans: } Charged entity formed when an atom gains or loses electronsCations {Ans: } - positive ions - metals tend to lose electrons to form cationsAnions {Ans: } - negative ions - non-metals tend to gain electrons to form anionsmultivalent elements {Ans: } - can form more than 1 stable ion (has multiple charges)polyatomic ions {Ans: } - ions that consist of 1 or more atom covalently bonded togethergroup 1 {Ans: } Alkali metals: - shiny, soft, silvery metals - very reactive - (-1) chargegroup 2 {Ans: } Alkaline Earth Metals: - not as