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Chemistry Quiz 30 (25 MCQs)

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1. The reaction to form proteins from amino acids is called
2. Decomposition of water into oxygen and Hydrogen is a/an _____ reaction.
3. What is the symbol of Carbon
4. Unstable nuclei that emit rays or particles to become stable are said to? ? ?
5. Wood + oxygen $\rightarrow$ carbon dioxide + water +energy ; what are the products
6. In order to survive, the flower sitting on the restaurant table needs water, carbon dioxide, andoxygen. What element do all three ofthese have in common?
7. What did James Chadwick discover?
8. The negative subatomic particle in an atom is the
9. A combination of substances that are not chemically combined is called a(n) _____
10. A gas is a form of matter that
11. What is true about the combinations of elements to become a compound?
12. During chemical and physical changes, substances can absorb or give off _____
13. Most elements on the periodic table are classified as _____
14. What bonds to make an ionic bonds?
15. The ability to transfer heat and electricity refers to _____
16. What happen to bromine water when react with ethene?
17. The Law of Conservation of Mass states that the total mass of the reactants should be
18. A vapor is a gaseous substance that is a liquid at room temperature.
19. Which metal is very abundant throughout the Earth, s crust and the most commonly used structural metal?
20. In a chemical reaction, everything to the rightof the arrow is called _____
21. Which among the following is a NOT MATTER?
22. An ice cube placed on a lab station counter becomes a pool of water. What term best describes this change in state?
23. Which branch of chemistry would look at the efficiency of a medication based on its reactions within a human body?
24. An element contains
25. The atomic weight of an atom is determined by the weight of
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