formulaUrl":null,"initialIndex":82,"initialQuestionWindow":[{"id":"e8bf37ab-4efd-43a0-acda-8d7c0cb8ab7a","revisionId":"0ad892d4-e013-457e-83f6-52c420cf33ed","questionNumber":null,"questionType":"LA","specification":"The number of electrons, neutrons, and protons in four different particles, **W**, **X**, **Y**, and **Z**, are shown in the table below.\n\n| Particle | Electrons | Neutrons | Protons |\n| :---: | :---: | :---: | :---: |\n| **W** | 18 | 22 | 20 |\n| **X** | 18 | 20 | 18 |\n| **Y** | 10 | 10 | 9 |\n| **Z** | 10 | 12 | 10 |","difficulty":3,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"6037c886-a4dd-433d-8906-78f718d0c346","label":null,"content":"Explain which particle, **W**, **X**, **Y**, or **Z**, is a positive ion.","markscheme":"- Identifies particle **W** as the positive ion M1\n- Explains that a positive ion must have more protons than electrons, or that particle **W** has 20 protons and only 18 electrons (resulting in a net positive charge) A1","marks":2,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"eafdeba9-39f1-438e-ae74-e1caa3dffe4a","revisionId":"fdbb9e10-e568-4241-b08c-53b617bd86a6","questionNumber":null,"questionType":"LA","specification":"The numbers of protons, neutrons, and electrons in four different particles, A, B, C, and D, are shown in the table below.\n\n| Particle | Protons | Neutrons | Electrons |\n| :---: | :---: | :---: | :---: |\n| **A** | 11 | 12 | 10 |\n| **B** | 18 | 22 | 18 |\n| **C** | 8 | 8 | 10 |\n| **D** | 6 | 6 | 6 |","difficulty":3,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"e63973fd-a739-48b9-919f-fb5ab2e355a1","label":null,"content":"Explain which particle, A, B, C, or D, is a negative ion.","markscheme":"- Identifies **C** (or Particle C) as the negative ion B1\n- Explains that it has more electrons than protons (or $10$ electrons and $8$ protons), resulting in a net negative charge A1","marks":2,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"ebd36127-15e4-4441-ab19-8fa6337126d2","revisionId":"a4f3d830-6c84-48ef-b223-cf0ae3069183","questionNumber":null,"questionType":"LA","specification":"A sample of neon gas used in high-voltage lighting consists of three stable isotopes: neon-20, neon-21, and neon-22.","difficulty":3,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"c9db2562-82e5-450e-998f-cd4b487a85f2","label":null,"content":"By referring specifically to the subatomic particles in these three isotopes of neon, explain the meaning of the term **isotopes**.","markscheme":"- Identifies that isotopes have the same number of protons (or the same atomic number / all three neon isotopes have 10 protons) B1\n- Identifies that isotopes have different numbers of neutrons (or different mass numbers / neon-20, neon-21, and neon-22 have 10, 11, and 12 neutrons respectively) B1","marks":2,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null}],"subjectCode":"gcse_chemistry","summaries":[{"id":"02d3996c-0ab3-44d4-8eb7-93238cb9f4ac","difficultyBand":"easy","calculatorUse":null},{"id":"07b33384-99e5-4ffb-b614-36045401716c","difficultyBand":"easy","calculatorUse":null},{"id":"08ec7588-1e43-440f-a902-b65c4ddfe8b1","difficultyBand":"easy","calculatorUse":null},{"id":"10675498-fdec-4fbe-8879-77e92b47eaac","difficultyBand":"easy","calculatorUse":null},{"id":"1602eb36-615a-43da-b4cd-b5e7a5611908","difficultyBand":"easy","calculatorUse":null},{"id":"1670815a-e0f5-4f9a-94cb-b1241ff13755","difficultyBand":"easy","calculatorUse":null},{"id":"16750dd9-6408-45a0-b678-997a994a65fc","difficultyBand":"easy","calculatorUse":null},{"id":"18478e1d-c6db-4ddf-b12e-bad6f96ebea2","difficultyBand":"easy","calculatorUse":null},{"id":"1

Atomic structure

Question 73

Atomic structure Questions

Atomic structure

Question 73

Atomic structure Questions