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Naming Covalent Compounds Purpose The purpose of this activity is to learn how to name smaller covalent compounds. Covalent compounds are defined as a group of atoms that stay together because of shared electrons in chemical bonds. Model 1 Formula and Name Examples for some simple covalent compounds CO = carbon monoxide CCl4 = carbon tetrachloride H2O = dihydrogen monoxide CO2 = carbon dioxide C4H10 = tetracarbon decahydride N2O4 = dinitrogen tetroxide The names of covalent compounds are similar to those of the ionic compounds, but there are differences. Use the model to figure out how the rules differ. 1. Using your periodic table, cross out the compounds below which are ionic. NaCl FeCl2 PF6 NaC2H3O2 BCl3 N2O CuCO3 SO3 C3H8 Al2(SO4)3 P2O5 2. What is the common ending for all of the names? 3. Is the name of the first element in the compound different from the normal name of the element? 4. In the compound CO, how many oxygen atoms are there? 5. In the name of the compound CO, what prefix is used to show how many oxygen atoms there are? 6. In the compound CO2, how many oxygen atoms are there? 7. In the name of the compound CO2, what prefix is used to show how many oxygen atoms there are? 8. In the compound H2O, how many hydrogen atoms are there? 9. In the name of the compound H2O, what prefix is used to show how many hydrogen atoms there are? 10. In the compound N2O4, how many nitrogen atoms are there? 11. What prefix is used to show how many nitrogen atoms there are in N2O4? 12. In the compound N2O4, how many oxygen atoms are there? 13. What prefix is used to show how many oxygen atoms there are in N2O4? 14. Is it necessary to use the prefix "mono" for the first element in the compound name when there is only 1 of that element? __ 15. As a team, determine the rules for naming covalent compounds when given the formula. 16. As a team, determine the rules for writing the formula for a covalent compound when given the name. 17. Name each of the compounds that were NOT crossed off in Question 1. Record the formula and the name of each compound. Chemical Nomenclature student handout, revised 02/2019

Naming Covalent Compounds
Purpose
The purpose of this activity is to learn how to name smaller covalent compounds. Covalent compounds are defined as a group of atoms that stay together because of shared electrons in chemical bonds.
Model 1 Formula and Name Examples for some simple covalent compounds
CO = carbon monoxide
CCl4 = carbon tetrachloride
H2O = dihydrogen monoxide
CO2 = carbon dioxide
C4H10 = tetracarbon decahydride
N2O4 = dinitrogen tetroxide
The names of covalent compounds are similar to those of the ionic compounds, but there are differences. Use the model to figure out how the rules differ.
1. Using your periodic table, cross out the compounds below which are ionic.
NaCl FeCl2 PF6 NaC2H3O2 BCl3 N2O CuCO3 SO3 C3H8 Al2(SO4)3 P2O5
2. What is the common ending for all of the names? ______
3. Is the name of the first element in the compound different from the normal name of the element? ______
4. In the compound CO, how many oxygen atoms are there? ______
5. In the name of the compound CO, what prefix is used to show how many oxygen atoms there are? ______
6. In the compound CO2, how many oxygen atoms are there? ______
7. In the name of the compound CO2, what prefix is used to show how many oxygen atoms there are? ______
8. In the compound H2O, how many hydrogen atoms are there? ______
9. In the name of the compound H2O, what prefix is used to show how many hydrogen atoms there are? ______
10. In the compound N2O4, how many nitrogen atoms are there? ______
11. What prefix is used to show how many nitrogen atoms there are in N2O4? ______
12. In the compound N2O4, how many oxygen atoms are there? ______
13. What prefix is used to show how many oxygen atoms there are in N2O4? ______
14. Is it necessary to use the prefix "mono" for the first element in the compound name when there is only 1 of that element? ______
15. As a team, determine the rules for naming covalent compounds when given the formula.
16. As a team, determine the rules for writing the formula for a covalent compound when given the name.
17. Name each of the compounds that were NOT crossed off in Question 1. Record the formula and the name of each compound.
Chemical Nomenclature student handout, revised 02/2019

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