Science

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Across
  1. 3. - a very small particle of matter that has a negative charge of electricity and that travels around the nucleus of an atom (discovered by Joseph John Thomson)
  2. 5. - Malleability is the quality of something that can be shaped into something else without breaking
  3. 7. – second name for vertical colums of elements
  4. 9. - a colorless volatile flammable liquid (formula C2H5OH)
  5. 13. - substance formed when two or more chemical elements are chemically bonded together.
  6. 15. - the quality or property of being soluble; relative capability of being dissolved
  7. 17. – positively charged ions
  8. 20. – Combination of pure substances neutron
  9. 21. - easily set on fire
  10. 23. - any of two or more forms of a chemical element, having the samenumber of protons in the nucleus, or the same atomic number, buthaving different numbers of neutrons in the nucleus, or different atomicweights.
  11. 26. – the elements in group 17
  12. 27. – regulated substance that makes dyes and fuel for transports (formula C6H6)
  13. 28. - soft heavy grey metal that melts easily and ispoisonous,. It is a chemicalelement: symbol Pb
Down
  1. 1. – The most popular element in a first group and first period of periodic table
  2. 2. - The vertical columns of elements are called
  3. 4. – number of protons
  4. 6. - a very small particle of matter that is part of the nucleus of an atom and that has a positive electrical charge.
  5. 8. - containing more than two atoms
  6. 10. – compound that dissolves in a water to form a solution with pH lower than 7
  7. 11. - any of the chemically inert gaseous elements of group 8A or 0 of theperiodic table
  8. 12. - negatively charged ions
  9. 14. – element in a first group and third period in a periodical table
  10. 16. - an electrically charged atom or group of atoms formed by the loss or gain of one or more electrons
  11. 17. The element found in group 14 period 2 is?
  12. 18. – has the most of the elements, good conductors of electricity and heat.
  13. 19. – the tendency to gain or lose electrons called
  14. 22. – horizontal row in a periodical table
  15. 24. - s air, the stuff we breathe, the thing that makes our lives possible. It is an element, a basic chemical found on the earth.
  16. 25. – compound that dissolves in a water to form a solution a pH greater than 7