• The learning process is entertaining and exciting
  • The solved tasks turn into coordinates
  • The chance to follow your progress
  • Along with your schoolmates and friends, go on an adventure, searching for hideouts
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210.3. Chemical periodic table and structure of the atom.

Write the answer!

In which group does chemical element Kr belongs to (answer must be written in arabic numbers, addition with A/B subgroups symbol, e.g. VIIB.)!
Insight in substances microstructure.
Periodic table of chemical elements and atom structure.

Solve tasks to find hidden Geo point coordinates

  1. Geometry: Rectangular (S = ab, a, b - edges) and area of the square (S=a^2 , a - edge) formula.
  2. Chemistry: Substance consistent invariables. Chemical formulas.
  3. Algebra: Different size units.
  4. Physics: Ultrasound, Infrasound and sound usage.
  5. Geometry: Parallelogram, diamond, triangle, right-angled triangle, trapeze area.
  6. Geometry: Rectangle, its properties and signs.
  7. Chemistry: Neutralisation reactions and calculations.
  8. Algebra: Reverse proportionality concept.
  9. Algebra: Fraction multiplication and division.
  10. Algebra: Albraic fraction.