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7th Grade Basic Chemistry 2
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7th Grade Basic Chemistry 2
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25 Questions

1. When two or more substances are combined but still keep their own identity.

2. properties that can be observed without changing the composition of the substance

3. What tool do we use to measure the amount of matter in an object?

4. Physical and chemical changes can be represented using an _______________________

5. The subscript in a chemical formula tells you what?

6. Where can we find the protons and neutrons

7. Anything that has mass and takes up space

8. what happens to atomic mass as you move from left to right on the periodic table?

9. 7 on pH scale

10. Ways to separate a mixture

11. Horizontal rows on the periodic table

12. when a substance is broken apart or when substances are combined and at least one new substance is made, then a ___________ has taken place

13. In a chemical change the reactants form at least one new product: True/False

14. To determine an object's density you need to know_____

15. Elements can be chemically combined to form a ___________

16. vertical columns on the periodic table

17. when litmus paper reacts with bases what color does it turn?

18. C6H12O6

19. 0-6 on pH scale

20. used to arrange elements based on similar characteristics into families and periods

21. a substance made of only one type of compound or one type of element is considered ________________

22. Which part of the periodic table tells us the number of electrons and protons

23. Atomic mass minus atomic number equals__________

24. A type of mixture that is uniform throughout. Can NOT see the parts

25. A scale used to measure how acidic or basic a substance is

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