Name:
Chemistry Questions
Section 1
Match the term below with its example or definition. Write the proper term on the line.
matterelementatomprotons
electronsisotopesatomic numberchemistry
neutronsnucleuselectron cloud
1. Atoms of an element with differing atomic masses butthe same atomic number are ______.
2. The form of matter containing only one type of atom is an ______.
3. Anything that has mass and takes up space is ______.
4. Particles in an atom's nucleus that do not have an electrical charge are the ______.
5. A building block of matter is called an ______.
6. Positively charged particles in an atom's nucleus are called ______.
7. Negatively charged particles outside the nucleus of an atom are called ______.
8. The ______contains most of the mass of an atom.
9. The ______takes up most of the space of an atom.
10. The ______shows the number of protons in an atom.
11. ______is the study of matter.
Atoms
Underlinethe proper term that correctly completes each statement.
12. Protons are particles (outside, in) the nucleus.
13. Electrons are atomic particles with a (positive, negative) charge.
14. An example of matter is (air, light).
15. (Neutrons, Protons) are particles in the atoms nucleus that have no electric charge.
16. The atomic particles outside of the atoms nucleus are (electrons, protons).
17. Substances made up of only one kind of atom are called (isotopes, elements).
18. Isotopes are atoms of the same element that have different numbers of (neutrons, proton).
19. Two atoms of the same element that have different (mass numbers, atomic numbers) are isotopes of the element.
20.A difference in the (mass number, atomic number) of atoms means the atoms are different elements.
21. The nucleus of an atom has a (positive, negative) charge.
22. Carbon-14 is an (isotope, element) of Carbon -12.
23. The mass number of an atom with 12 protons and 12 neutrons is (12, 24).
24. The atomic number of an atom is equal to the number of (protons, neutrons) in its nucleus.
25. In atoms with equal numbers of electrons and protons, there is (a positive, no) electric
charge.
26. A model of an atom is (larger, smaller) than the actual atom.
27. The nucleus of an atom is made up of neutrons and (electrons, protons).
28. Isotopes enable scientists to determine the (age, size) of ancient objects.
Matter and Its changes
Write theletter of the term that best completes each statement in your notebook.
_____29.A(n) ____ is the basic unit of matter.
a. electron b. moleculec. atomd. space
_____30.Hydrogen-1 and hydrogen-2 are ______of one another. a. ions b. conductors c. isotopes d. compounds
_____31.Isotopes of carbon have different ______. a. numbers ofelectrons b. mass numbers c. atomic numbers d. numbers of protons
Element / Symbol / Element / Symbol32 / Copper / 37 / Ge
33 / Lithium / 38 / K
34 / Silicon / 39 / Mg
35 / Zinc / 40 / Mn
36 / Boron / 41 / Ni
Use the Periodic Table to fill in the chart.
Period / Family or Group / ElementsEx. / 2 / 16 / Oxygen
42. / 3 / 1
43. / 6 / 2
44. / 1 / 18
45. / 4 / 9
FINDING THE ELEMENT
The periods and families of five elements are listed. Find each element in the Periodic Table. Then fill in the missing information. One element, oxygen, has already been done for you.
After you have completed the chart, answer the following questions about the elements on the chart.
46. Which one of these elements is the lightest? ______
47. You know it is the lightest because it has the ______(highest, lowest)atomic number .
Period / Group / Element48-49. / Chlorine
50-51. / Potassium
52-53. / Neon
54-55. / Tin
56-57. / Sodium
58-59. / Helium
60-61. / Krypton
FINDING THE PERIODS AND GROUPS
The names of five elements are listed. Find each element in the Periodic Table. Then fill in the missing information. Use numbers and not Roman Numerals.
Use the definitions of atomic number and mass number to help you fill in the blanks in the table below.
Element / Number of Protons / Number of Neutrons / Number of Electrons / Atomic Number / Mass Number62-63. / Oxygen / 8 / 8 / 16
64-65. / Silicon / 14 / 14 / 28
66-67. / Aluminum / 14 / 13 / 13
68-70. / Iron / 26 / 56
71-72. / Calcium / 20 / 20 / 41
73-75. / Sodium / 11 / 23
76-77. / Copper / 29 / 35 / 29
78-80. / Magnesium / 12 / 24
81-83. / Gold / 79 / 197
84-86. / Silver / 61 / 47
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