Across
- 2. – has the most of the elements, good conductors of electricity and heat.
- 6. - the smallest part of element
- 7. - any of the chemically inert gaseous elements of group 8A or 0 of theperiodic table
- 9. - a very small particle of matter that is part of the nucleus of an atom and that has a positive electrical charge.
- 10. - 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)
- 11. - The vertical columns of elements are called
- 12. - molecules are groups on non-metalic atoms held together by
- 15. – number of protons
- 19. - the stuff we breathe, the thing that makes our lives possible. It is an element, a basic chemical found on the earth.
- 20. - quality of something that can be shaped into something else without breaking
- 21. - easily set on fire
- 24. - a forms when two or more non-mettalic atoms bond together
- 25. – The most popular element in a first group and first period of periodic table
- 27. - has a pH of 7
- 29. - negatively charged ions
- 30. – regulated substance that makes dyes and fuel for transports (formula C6H6)
Down
- 1. – horizontal row in a periodical table
- 3. – compound that dissolves in a water to form a solution a pH greater than 7
- 4. - substance formed when two or more chemical elements are chemically bonded together.
- 5. - when acids and bases react together, both acidic and basic properties disappear
- 8. The element found in group 14 period 2
- 13. – element in a first group and third period in a periodical table
- 14. - containing more than two atoms
- 16. – Combination of pure substances neutron
- 17. - the quality or property of being soluble; relative capability of being dissolved
- 18. – the tendency to gain or lose electrons called
- 22. – positively charged ions
- 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 atomic weights.
- 25. – the elements in group 17
- 26. - an electrically charged atom or group of atoms formed by the loss or gain of one or more electrons
- 28. – compound that dissolves in a water to form a solution with pH lower than 7