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214.1. Periodic table of chemical elements and atomic structure.

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In which period does chemical element N belong to (answer must be written as a number, e.g. 5.)?
Insight in substances microstructure.
Periodic table of chemical elements and atom structure.

Solve tasks to find hidden Geo point coordinates

  1. Physics: Archimedes law.
  2. Algebra: Fraction amplification and abbreviation.
  3. Chemistry: Atoms un ķīmiskie elementi.
  4. Geometry: Curve angle value, center angle and indrawn angle.
  5. Geometry: Rectangular (S = ab, a, b - edges) and area of the square (S=a^2 , a - edge) formula.
  6. Algebra: Numerical approximation.
  7. Algebra: Numerical approximation.
  8. Algebra: Parabola.
  9. Algebra: Square root extraction
  10. Geometry: Distance between parallel straight lines.
  11. Algebra: Moda
  12. Geometry: Right-angled triangle outlined circle lines center location.
  13. Geometry: The Pythagorean Theorem. The practical application of Pythagorean Theorem in everyday life.
  14. Algebra: Fractions main property
  15. Algebra: Actual numbers.
  16. Algebra: Square trinomial roots
  17. Algebra: Fraction addition and subtraction.
  18. Algebra: Relative frequency
  19. Chemistry: Gas volume calculations
  20. Algebra: Equation with unknown denominator.
  21. Chemistry: Periodic table of chemical elements and atomic structure.
  22. Physics: Ultrasound, Infrasound and sound usage.
  23. Algebra: Formula y = k/x
  24. Algebra: Rational fraction expression.
  25. Algebra: Absolute and relative mistake of approximation
  26. Chemistry: Substances physical properties and transformations.
  27. Geometry: Rectangular (S = ab, a, b - edges) and area of the square (S=a^2 , a - edge) formula.
  28. Geometry: Triangle median properties.
  29. Chemistry: Air composition and usage(reactions).
  30. Algebra: Albraic fraction.
  31. Physics: Light reflection and mirrors.
  32. Geometry: Area of parallelogram, rhombus, triangle, right-angled triangle, trapeze.
  33. Physics: Measurement.
  34. Geometry: Diameter, which is perpendicular to chord, properties.
  35. Algebra: Square trinomial distribution into multipliers
  36. Geometry: Squar, properties and signs.
  37. Geometry: Area of parallelogram, rhomb, triangle, right angled triangle and trapeze.
  38. Physics: mass
  39. Physics: Gravitation, friction and deformation.
  40. Algebra: Median
  41. Geometry: Rectangle (S = ab, a, b - edges) and area of the square (S=a^2 , a - edge) formulas
  42. Physics: Spread of sound.