Electron configurations and the periodic table

GCSE · Chemistry · OCR · C2 — Elements, compounds and mixtures — atomic structure, periodic table trends, separation techniques

Question

OCR J258/01 — Foundation/Higher

(a) Write the electron configuration of: (i) Magnesium (atomic number 12) (1 mark) (ii) Sulfur (atomic number 16) (1 mark) (iii) Potassium (atomic number 19) (1 mark)

(b) Explain why elements in the same group of the periodic table have similar chemical properties. (2 marks)

(c) Potassium is in Group 1, Period 4. Without using a data book, state the number of electron shells in a potassium atom. Explain how you know. (2 marks)

7 marks · take your time before peeking.

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Generated by TopMyGrade AI · cross-check official sources before relying on the mark-scheme phrasing.