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Chemistry Quiz 38 (25 MCQs)

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1. The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of
2. Which of the following is a definition of a molecule?
3. Average atomic mass of cesium is 133. what is the mass of 3 mol?
4. How many total electrons does Na+1 (a sodium ion) have?
5. Which subatomic part of an atom gives it a positive charge?
6. This is a type of mixture where one substance dissolves into another
7. Hydrogen gas (H2) is an example of a
8. This monosaccharide is not involved in energy production but the structural components of the nucleic acids
9. Which scientist described a positively charged core ("nucleus" ) in the middle of a lot of empty space?
10. As the temperature goes up, the solubility of all solids in water
11. Chemical used in photography is
12. What is the smallest 'building block' of the elements that make up the universe?
13. A compound has the formula Al2O3 . What are the correct number of elements in the formula?
14. A heterogenous mixture can be separated by all of the methods EXCEPT,
15. Which would have a greater mass, 6.02 x 1023 atoms of H or 6.02 x 1023 atoms of He?
16. Pure substance made up of two or more elements that have been chemically combined ( ionic bond), and have a fixed ratio.
17. Water drops are spherical because of?
18. Elements that show the properties of both metals and non metals are called?
19. Which of the following cannot be broken down by ordinary chemical means?
20. The mass of a mole of NaCl is the
21. Science that deals with, matter, its composition, structure and properties, the changes it undergoes, and the energy accompanying the changes between them.
22. Which of the following can directly affect the movement of particles?
23. Modern Periodic Table me kitne group hain
24. When comparing a mole of oxygen and a mole of sulfur, how many atoms does each have?
25. What subatomic particle is negatively charged?
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