Ion Isotope Practice

Reminders: 1. In a neutral atom the number of protons equals the number of electrons. 2. An atom can NEVER gain or lose protons 3. The number of protons equals the atomic number

NAME:________________________________________

Ion Practice Set
1. What is an ion? 2. What does the number next to the ions signify?

Complete the following table, using the periodic table in the back of your book.
ELEMENT NAME ION SYMBOL NUMBER OF PROTONS NUMBER OF ELECTRONS NUMBER OF ELECTRONS LOST OR GAINED

ex

Fluorine

F-

9

10

gained one

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 lithium Rb+ Haluminum Sr+2 H+ potassium Ca+2

53 16

54 gained two lost one

35

36

8 12 10 34 36

gained two lost two

lost one

17

18

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Isotopes Practice Set
1. What is an isotope? 2. What does the number next to isotopes signify? 3. How can you tell isotopes apart? For each of the following isotopes, write the number of protons, neutrons, and electrons. Chromium-58 Chromium-63 # of protons # of neutrons # of electrons # of protons # of neutrons # of electrons Carbon-12 Carbon-16

Nitrogen-15 # of protons # of neutrons # of electrons

Nitrogen-20 # of protons # of neutrons # of electrons

Sulfur-23

Sulfur-25

Fill in the isotope names and any missing information, including isotope numbers from the chart. Use your periodic table and the information provided. Iodine# of protons # of neutrons 32 # of electrons 35 # of electrons Iodine# of protons # of neutrons 27 30 IronIron-

# of protons # of neutrons 113 # of electrons 55 111

# of protons 32 # of neutrons 30 # of electrons 32