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Chemistry Quiz 43 (25 MCQs)

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1. The ratio of the number of hydrogen atoms to the number of oxygen atoms in H2O is _____
2. What is the monomer of carbohydrates?
3. The second law of thermodynamics states that useful energy is always
4. Ionization refers to the process of
5. How do you calculate atomic charge?
6. Iron + oxygen = rust is an example of a _____
7. The most abundant element in the earth's crust is?
8. When one atom loses an electron and becomes positive and another atom gains an electron and becomes negative, they stick together like magnets. What is this called?
9. What is the atomic number of carbon?
10. When is an ionic bond formed?
11. The modern periodic table is arranged according to
12. Hair, skin, muscle, and fingernails are made out of _____
13. What state of matter has no definite shape, but has a definite volume?
14. What type of particle is:Br2
15. Which scientist measured the charge of an electron as 1.602 x 10-19 Coulombs?
16. Find the mass in grams of 2.25 x 1024 atoms of calcium (Ca).
17. What is a neutron?
18. The 4 macromolecules are
19. The number of protons or electrons found in the nucleus of an atom
20. When an atom loses an electron, it becomes a(n) _____ ion.
21. Which would have a greater mass, 10 atoms of H or 10 atoms of He?
22. Atoms have equal number of
23. Molecules that store genetic information are
24. What is extracted from Bauxite?
25. What is an atomic group?
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