Chemistry PowerPoint Notes
1. What makes up
everything in the universe?
2. Name 2 properties of
all matter.
3. Define mass.
4. How does weight
differ from mass?
5.What are elements?
6. Name the 4 elements
that make up most of a living thing.
7. What is used to
represent an element?
8. Name the smallest
part of an element.
9. What are the 2 main
regions of an atom?
10. Where is the
nucleus of an atom found and what does it contain?
11. What is the charge
on a proton?
A neutron?
12. All atoms of the
same element have the ________ number of protons.
13. The number of
protons in an atom determines the _________________________.
14. What is the charge
on an electron?
15. If you know the
number of protons in an atom, how can you determine the number of electrons?
16. Do all the atoms of
the same element have the same number of neutrons?
17. Atoms of the same
element with different numbers of neutrons are called ___________.
18. The mass of an atom
is centered in the ___________.
19. The number of
protons PLUS neutrons in an atom determines its ___________________.
20. What atomic
particle has a negative charge?
21. Why isn’t the
mass of an electron used to determine the atomic mass of an element?
22. Where are electrons found?
23. Which electrons in
an atom have the most energy?
24. How many energy
levels are there & name them?
25. How many electrons
will each energy level hold?
26. Elements are
arranged on a __________________ by their atomic _____________.
27. What are Periods
& what do they tell you about elements?
28.What are Families
& what do they tell you about elements?
29. Two or more
elements combined together make a _____________.
30. Chemical
______________ represent compounds.
31. _____________ are
the smallest part of a compound.
32. ______________ in
chemical formulas tell the number of atoms of each element.
33. _____________ in a
formula tell the number of molecules.
34. Compounds have
____________ properties than its elements.
35.
The outermost _______________ in elements determine if they will combine.
36. Elements with
___________ outer energy levels are stable & won’t react.
37. Why do elements
tend to react with other elements?
38. Chemical
_____________ represent chemical reactions.
39. ______________
appear on the right of the equation, while ___________ are on the left.
40. Chemical bonds
store ____________.
41. How do covalent bonds form?
42. How do ions form?
43. Positive ions
_________ electrons, while negative ions ___________ electrons.
44.
Define energy.
43. Give some examples
of different forms of energy.
44. Atoms are in
constant ________________, which determines the atom’s ____________.
45.
List the 3 main states of matter.
46. _______________
energy must be added or removed to change the state of matter.
47. In reactions the
amount of product must ____________ the amount of reactants.
48. Most of an
organism’s energy comes from _____________ in foods.
49. _______________
reactions release energy.
50. Give an example of
an exergonic reaction in cells.
51. _________________
reactions store energy.
52.
Give an example of an endergonic reaction in cells.
53. Most reactions in
cells are _________________.
54.
_________________ energy is the energy needed to start a reaction.
55. Catalysts
_____________ the amount of activation energy needed.
56. Catalysts in
organisms are called ______________ and are usually ______________.
57. Enzymes act on
____________ which join at the _______________ site.
58. Can enzymes be
reused?
59. Redox reactions
stands for _________________________ reactions.
60. The oxidized
substance _____________ electrons & becomes _____________ charged.
61. The reduced
substance _____________ electrons & becomes _____________ charged.
62. Define solution.
63. The _____________
is dissolved in the ____________ in a solution.
64. _______________ is
the universal solvent.
65. A solution becomes
_____________ when no more solute will dissolve.
66. ______________
solutions have water as the solvent & are important to ______________.
67. What is the dissociation of water?
68. Write the equation for this.
69.
OH is the ______________ ion, while H+ is the ______________ ion.
70. Acids produce
_____________ ions, while bases have an excess of ________ ions.
71. The _______ scale
measures the concentration of H+ ions and goes from ____________.
72. From 0 to 7 are
___________, a pH of 7 is __________, & above 7 to 14 are _________.
73. _____________ are
used in the body to control pH and keep it near a pH of ______ or neutral.
