science

4. Indicator / Special matter from lichen which is using for determining the type of solutions
9. acid / Another name for vitamin C
11. level / Outer level of an atom
13. / According to PH scale,it is neither acidic nor basic ,and have ph=7
14. change / Dissolving sugar in water
15. / Forms in result of mixing two different ionic compounds,always have low solubility and sometimes have a specific colour
17. / Red lithmus
19. acid / Strong acid which is known as "stomach acid"
23. / The sign which determine that solution is soluble
24. / Reaction between acid and base
25. / Gas which is composing 78% of air
27. / Assist in pouring a liquid from a wide-mouth container to a small-mouth container
28. acid / Which acid mostly react with metals?
29. gases / Man-made elements
30. / Formula of ammonia

1. / Which subatomic particle determines what the element is?
2. / Liquid,gas,solid
3. / Who had discovered the nucleus?
5. / solutions which conduct electricity
6. combustion / Reaction in result of what will be formed carbon dioxide and water vapour
7. / Compounds which are consisting from cation of metals and hydroxide
8. / Equation is based on breaking down
10. / Kind of chemical mixture where the components are in different states
12. / Elements which have properties as metals as non-metals
16. rule / "Rule of eight"
18. / The process of gaining or losing electrons
20. / Atoms of the same element ,but with different numbers of masses
21. / Matter which is known as "swamp gaz"
22. / Element in fourteenth group,fifth period
26. / Positevely charged ions