Name:
Chemistry Questions
Section 1
Match the term below with its example or definition. Write the proper term on the line.
matter
element
atom
protons
electrons
isotopes
atomic number
chemistry
neutrons
nucleus
electron cloud
1. Atoms of an element with differing atomic masses but the 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
Underline the 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.
1
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 the letter of the term that best completes each statement in your notebook.
_____29. A(n) ____ is the basic unit of matter.
a. electron
b. molecule c. atom
d. 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 of electrons
b. mass numbers
Element
c. atomic numbers
Symbol
d. numbers of protons
Element
Symbol
Use the Periodic
32
Copper
37
Ge
Table to fill in the
33
Lithium
38
K
chart.
34
Silicon
39
Mg
35
Zinc
40
Mn
36
Boron
41
Ni
FINDING THE ELEMENT
Period
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.
Ex.
2
Family or
Group
16
42.
3
1
43.
6
2
44.
1
18
45.
4
9
Elements
Oxygen
46. Which one of these elements is the lightest? _______________
47. You know it is the lightest because it has the ______________ (highest, lowest)atomic number .
2
Period
FINDING THE PERIODS AND
Group
Element
GROUPS
48-49.
Chlorine
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.
50-51.
Potassium
52-53.
Neon
54-55.
Tin
56-57.
Sodium
58-59.
Helium
60-61.
Krypton
Use the definitions of atomic number and mass number to help you fill in the blanks in the table below.
Element
62-63.
Oxygen
Number
of Protons
8
64-65.
Silicon
14
66-67.
Aluminum
68-70.
Iron
71-72.
Calcium
73-75.
Sodium
76-77.
Copper
78-80.
Magnesium
81-83.
Gold
84-86.
Silver
Number of
Neutrons
14
14
Number of
Electrons
8
Atomic
Number
28
13
13
26
20
29
20
35
Mass
Number
16
56
41
11
23
12
24
29
79
197
61
3
47