Download Document

Name _____________________________________________ Date _________________ Per. ______
Isotopes and Ions Review:
Part 1 Isotopes
1. Define isotope:
2. What would happen if the number of protons were to change in an atom?
3. Another way to write isotopes is to write the name of the element then add the mass number after a
dash, for example, 614C is carbon-14. What does the 6 and the 14 represent in this notation?
4. Here are three isotopes of an element:
12
6 C
13
6 C
14
6 C
a. The element is _________________________
b. The number 6 refers to the ____________________________.
c. The numbers 12, 13, 14 refer to the ___________________________________.
d. How many protons and neutrons are in the first isotope? _______________________________
e. How many protons and neutrons are in the second isotope? _______________________________
e. How many protons and neutrons are in the third isotope? _______________________________
Complete the following Chart:
Isotope name
Atomic
Number
Mass Number
Number of
Protons
Number of
Neutrons
92 Uranium-235
92 Uranium-238
5 Boron-10
5 Boron-11
Part II Ions:
Determine the charges on the following using the chart above as a guide:
1. An atom having lost two electrons ________
Number of
Electrons
2. An atom having lost six electrons ________
3. An atom having gained one electron ________
4. An atom having gained three electrons ________
5. an atom having lost five electrons ________
6. An atom having gained two electrons ________
7. An atom having gained four electrons ________
Complete the following:
For each of the ions listed in column 1, use the periodic table to find in column 2 the total number of
electrons that ion contains.
______ 1. Be1+
A. 2
______ 2. B3+
B. 3
______ 3. Mg2+
C. 10
______ 4. S2-
D. 18
Element/Ion
1
1
1
Atomic
Number
Mass Number
Number of
Protons
Number of
Neutrons
H
1
H+
9F
19
-
2+
20 Ca
40
28O
16
7N
14
3-
Candy Compounds Review:
1. Draw a dot structure diagram for an H2 molecule. Include the charges/bonds.
2. Draw a dot structure diagram for a BeO compound. Include the charges/bonds.
Number of
Electrons