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What is an “ion?”

21. What is an “ion?”
22. What is the difference between AC and DC power?
23. Basically how is the magnetic field of our Earth set up and where are the north and south poles? How often does the Earth’s magnetic field change?
24. What is light and all other radiation composed of?
25. What determines one type of radiation from another?
26. What determines the energy of radiation emitted from an object? What does a higher energy say about the wavelength of that radiation?
27. What determines the color of an object?
28. What is meant by the colors black and white?
29. Given the Stefan-Boltzman law (E=σT4), determine how radiation is affected by a changing temperature.
30. How does the peak wavelength change as an object’s temperature changes?
31. What components make up an atom?
32. Which part of the atom is involved with chemical reactions?
33. What is an ‘isotope?’
34. Using the Periodic Table, be able to identify the following for any given isotope
a. Number of electrons
b. Number of protons (same as atomic number)
c. Number of neutrons
d. Mass number (what atom is the reference)
e. Atomic Weight (know how it is derived)
35. What do the columns of the Period Table tell you especially with regards to the number of electrons in the outer orbit?
36. What is an ‘orbital?’
37. What are ‘noble gases’ and what can you say about their outer electrons? Where are they found on the periodic table?
38. What occurs during a ‘chemical reaction?’ What are the following?
a. Reactant
b. Products
39. Describe and be able to give some examples of the following:
a. Ionic bond
b. Covalent bond
c. Polar covalent bond
40. Be able to identify the number of atoms in a given chemical formula.
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