Organisation of the periodic tableIB MYP Chemistry: Mind map

Exam questions on Organisation of the periodic table

1. A teacher is explaining to her class how the elements are organised in the periodic table. The elements are laid out in rows and columns, and she wants the students to understand what decides where each element goes.
   Explain why elements in the same group have similar chemical properties.2 marks
2. A technician has four unlabelled samples to sort. Sample W is a shiny solid that conducts electricity well and can be hammered into thin sheets. Sample X is a dull yellow solid that is brittle and does not conduct electricity. Sample Y is a shiny solid that is brittle and conducts electricity only poorly. Sample Z is a colourless gas at room temperature.
   Explain, using the information given, why sample X is classified as a non-metal.2 marks
3. Two unknown elements, P and Q, have the electron arrangements 2,8,5 and 2,8,8,2 respectively. Students are given a periodic table and asked to work out the position of each element from its electron arrangement.
   State the atomic number, the group and the period of element P.3 marks