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![lemons]()
1. What end of the pH scale is lemon juice?
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![human bodies]()
2. Which is the most abundant mineral in human bones?
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![lake and blue sky]()
3. Which of these is a TRUE statement about the unique properies of water.
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![balloons]()
4. Why do helium balloons float?
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![salt]()
5. Which of these is another name for salt?
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![sugar cubes]()
6. What is the chemical formula for sucrose (a.k.a. a common type of sugar)?
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![decorated face under black light]()
7. True or False: Radioactive elements can cause a glow-in-the-dark effect.
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![sky]()
8. Which of these is the chemical formula for what humans need to breathe?
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![diamonds]()
9. Which if these is technically possible to turn into a diamond?
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![gasses in outer space]()
10. What is the first element in the periodic table?
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![pH Litmus Test]()
11. Which turns litmus paper blue?
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![pH Litmus Test]()
12. Which turns litmus paper red?
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![Inside of an Atom]()
13. What is the number of protons and neutrons in an atom called?
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![Atomic structure]()
14. An atom with a positive or negative charge is known as what?
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![One row in the periodic table is known as this:]()
15. One row in the periodic table is known as this:
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![Chemical Reaction]()
16. What is formed when an acid and base react?
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![Fire and Water Colliding]()
17. What is a reaction that gives off heat?
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![Different structures of atoms]()
18. What are two atoms that are of the same element, but have a different number of neutrons called?
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![Which of the following has a negative charge?]()
19. Which of the following has a negative charge?
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![Waterfall]()
20. Gases and liquids have this in common:
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![Dry Ice Flowing]()
21. What is the phase change when a solid turns into a gas?
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![An atom's atomic number represents its:]()
22. An atom's atomic number represents its:
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![Neon Signs]()
23. True or False: The element Neon (Ne) is a metal.
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![Sketch of compound on chalkboard]()
24. The substances formed during a chemical reaction are known as the:
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![Students performing chemical reaction]()
25. Which of the following may indicate a chemical reaction?
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![Cartoon of chemistry lab]()
26. A _________ reaction is when two or more substances react to form one product.
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![Radioactive Warning Symbol]()
27. What is an unstable atom where the nucelus is decaying?
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![Diamonds and Gemstone]()
28. If a substance with two or more elements contains carbon, it is called this.
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![Covalent Bond in Water]()
29. What is a bond in which atoms share an electron?
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![electric sphere]()
30. How many electrons can be held in the first shell of electrons?
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![gas stove]()
31. What are noble gases?
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![Scientist looking into microscope]()
32. True or False: Elements can be broken down into simpler substances
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![Several solutions in a lab.]()
33. What is the difference between a suspension and a solution?
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![lightning]()
34. How many electrons does an atom want on its outer shell?
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![Man holding positive charge]()
35. A positively charged ion is known as:
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![Ocean waves]()
36. Which of these choices describes chemical compounds that make up the majority of seawater?
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![Mendeleev]()
37. Who is the scientist who created the first periodic table?
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![Earth]()
38. The law of conservation of mass states that atoms cannot be created nor ______________.
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![Pounding Metal]()
39. Which of the following is an example of a physical property?
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![Fire]()
40. What is heat capacity?
Did you hear that oxygen and magnesium were dating? Like OMg! Now if you don’t get this joke, it may have been a long time since you’ve even thought about chemistry. Read more