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5th Grade Science: Atoms and Molecules
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5th Grade Science: Atoms and Molecules
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25 Questions

1. Examples of acids.

2. A substance that changes color when exposed to acid or base solutions

3. What scientist think about atoms based on repeated observations of how atoms act in experiments

4. The horizontal rows of the periodic table in which all elements in each row have the same number of shells.

5. An atom that has gained or lost electrons

6. What happens in a Synthesis Chemical Reaction?

7. What does the chemical formula H2CO# tell you about the compound known as carbonic acid?

8. A type of atomic bond in which atoms share electrons

9. A change in which different types of atoms form a compound that does not change the structure of the atoms but makes one or more new substances; also called a chemical change

10. Abbreviations for the names of elements

11. Which kind of atomic bonding is somewhat like magnetism and why?

12. the center section of an atom made up of protons and neutrons

13. How is the compound H2O different from the elements hydrogen and oxygen?

14. A special machine scientist use to smash atoms

15. When atoms join with different atoms

16. the smallest piece of an element

17. Forms hydroxide when they are dissolved in water. Tastes bitter. Feels slippery. Example is soap.

18. Why do noble gases rarely undergo chemical reactions?

19. A particle formed when atoms join with other atoms.

20. Forms hydrogen ions when they are dissolved in water. Tastes sour. Can burn and be corrosive.

21. How is salt formed?

22. Explain why all compounds are molecules but not all molecules are compounds.

23. A positively charged particle of an atom found in the nucleus of the atom

24. Examples of bases.

25. Bases that dissolve in water are referred to as what?

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