formulaUrl":null,"initialIndex":18,"initialQuestionWindow":[{"id":"2367427f-37af-4d64-8afa-60fae38d6b80","revisionId":"35628f68-b658-44a2-b3a1-71e62d5f8b3e","questionNumber":null,"questionType":"LA","specification":"","difficulty":3,"difficultyBand":"medium","totalMarks":8,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"ff5b389d-4437-42b6-9563-2ceadc5aed17","label":"a","content":"Complete the sentences about the structure of an atom. Use words from the list below:\n\nelectrons, negative, neutral, neutrons, positive, protons\n\nAn atom has a nucleus with a .................... charge. The nucleus is made up of .................... and .................... .","markscheme":"- States that the nucleus has a **positive** charge B1\n- States that the nucleus is made of **protons** and **neutrons** (in either order) B1","marks":2,"order":0,"markingRubric":null,"explanation":null,"options":[]},{"id":"decd8c9e-552f-4cbf-b5ac-f438dbb4233c","label":"b","content":"Look at the information about two isotopes of oxygen:\n\n\\[\\text{Isotope 1: } {}^{16}_{8}\\text{O} \\qquad \\text{Isotope 2: } {}^{18}_{8}\\text{O}\\]\n\nWhich **two** statements about the isotopes of oxygen are correct?\n\n* Oxygen has 16 protons.\n* The atomic number of oxygen is 8.\n* The electrons are heavier than the protons.\n* The isotopes of oxygen have different numbers of neutrons.\n* The isotopes of oxygen have different numbers of protons.\n* The mass number is the same for both isotopes.","markscheme":"- Correctly identifies that 'The atomic number of oxygen is 8' B1\n- Correctly identifies that 'The isotopes of oxygen have different numbers of neutrons' B1","marks":2,"order":1,"markingRubric":null,"explanation":null,"options":[]},{"id":"7a3a0ed8-5082-4fcd-ac37-dff7b6eca6a0","label":"c","content":"The diagram shows an oxygen atom.\n\n![An electron configuration diagram of an oxygen atom. The center represents the nucleus and is labeled with the letter 'O'. Surrounding the nucleus are two concentric circles representing electron shells. The inner circle has 2 electrons shown as small cross marks ('x') near the top. The outer circle has 6 electrons shown as small cross marks: one pair at the top, one pair on the left side, and two single electrons on the right and bottom sides.](https://assets.mathsgenie.co.uk/aqa-qb/62e3ce7b-cf2f-42db-8fa4-63a843a31751.png)\n\nExplain why oxygen is in Group 6 of the Periodic Table.","markscheme":"- Explains that oxygen has 6 electrons in its outer shell (outermost energy level) B1","marks":1,"order":2,"markingRubric":null,"explanation":null,"options":[]},{"id":"a8c4d136-86d7-400f-bc4b-146bb9e879e6","label":"d","content":"Oxygen is in Group 6 of the Periodic Table. Oxygen is a non-metal.\n\nWhy do non-metals form negative ions?","markscheme":"- Explains that non-metals gain electrons M1\n- To achieve or form a complete or full outer shell A1","marks":2,"order":3,"markingRubric":null,"explanation":null,"options":[]},{"id":"78082f5e-a102-42fb-a834-cefd25a97b17","label":"e","content":"Oxygen reacts with magnesium to form magnesium oxide.\n\n* The formula for magnesium oxide is \$\\text{MgO}\$.\n* The symbol for an oxide ion is \$\\text{O}^{2-}\$.\n\nWhat is the symbol for a magnesium ion?","markscheme":"- Identifies the symbol for the magnesium ion as $\\text{Mg}^{2+}$ B1","marks":1,"order":4,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"2457b0fa-2a12-493f-a228-74b1453fa8c2","revisionId":"827fb25b-cf70-4a68-ad8c-838dbdbd3f47","questionNumber":null,"questionType":"MC","specification":"An ion $\\text{X}^{2-}$ has the electronic configuration $1s^2 2s^2 2p^6 3s^2 3p^6$.\n\nWhat is the position of the element $\\text{X}$ in the Periodic Table?","difficulty":8,"difficultyBand":"medium","totalMarks":1,"sourceTitle":null,"calculatorUse":null,"parts":[],"options":[{"id":"51b0f528-8b39-4ae5-a981-4fb0fae7d62c","content":"Period 3, Gro

Atomic structure

Question 7

Atomic structure Questions

Atomic structure

Question 7

Atomic structure Questions