COLEGIO DE LA PURISIMA CONCEPCION
The School of the Archdiocese of
Capiz Roxas City
NAME:
YEAR / SECTION
DATE
WORK SHEET NO.
3 CHEMICAL
BONDS
I. Learning Competency
Explain how ions are formed.
PRE-ASSESSMENT
Multiple Choice: Read and analyze each item carefully. Choose the letter of the correct
answer.
______1. In periodic table, valence electrons are indicted by ______
a. group number
b. shell number
c. period number
d. atomic mass
______2. Which group in the periodic table is characterized by the elements’ stable electron
configuration?
a. 2A
b. 3A
c. 8A
d. 6A
______3. The term valence electrons refers to the _____.
a. unpaired electrons of an atom
b. the innermost electrons of an atom
c. the electrons of an atom in the outermost energy level
d. the electrons of an atom that can move to the nucleus
______4. In a Lewis dot diagram, the electrons shown ______.
a. are in the innermost energy level
c. always equal the number of protons
b. are in the outermost energy level
d. always add up to an even number
______5. The atoms in a column of the periodic table all have _____
a. the same abbreviation
b. the same number of energy levels
c. the same number of electrons
d. the same number of electrons in the outer energy level
______6. An element and an atom are different but related because ______
a. a particular element is made up of many different types of atoms
b. a molecule is the same as an atom
c. an element is made up of all the same type of atom
d. an element is smaller than an atom
______7. In the process of ionic bonding, ions come together because _______.
a. Opposite charges repel
c. salt is magnetic
b. Positive and negation ions attract
d. like charges attract each other
______8. Which of the following atoms will gain two electrons in its valence shell to achieve a noble
gas configuration and form an ion?
a. 20Ca
b. 17Cl
c. 6C
d. 8O
______9. Which of the properties of atoms is the most suitable reference for the kind of bond that
will take place between/among them?
a. Electronegativity
c. Atomic size
b. Ionization energy
d. Electron affinity
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______10.What will most likely happen to a non-metallic atom after ionic bonding?
I.
It forms a cation
c. It becomes stable
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II.
It forms an anion
a. I & II
b. II & III
d. It becomes unstable
c. III & IV
d. I & IV
Activity Proper
A. Determine whether the bond formed between each of the elements listed below
would be ionic or covalent based on the metallic/nonmetallic nature of the elements
involved.
______________1.
______________2.
______________3.
______________4.
______________5.
HCl
CO2
KBr
PCl3
CH4
______________6. LiF
________________11. SF6
______________7. Al2O3
________________12. NaBr
______________8. CCl4
________________13. CaCl2
______________9. SO3
________________14. IF7
______________10. K2O
________________15. K2Se
B. For each of the following ionic bonds:




Write the symbols for each element
Draw a Lewis Dot Structure for the valence shell of each element
Draw an arrow (or more if needed) to show the transfer of electrons to the new element.
Write the resulting chemical formula.
1. Sodium atom reacts with Carbon
3. Aluminum atom reacts with Sulfur
2. Potassium atom reacts with Oxygen
4. Aluminum atom reacts with Selenide
5. Aluminum atom reacts with Bromine
6. Potassium atom reacts with Nitrogen
7. Magnesium atom reacts with Nitrogen
8. Rubidium atom reacts with Sulfur
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9. Potassium atom reacts with Phosphorous
10. Strontium atom reacts with Oxygen
C. For each of the following covalent bonds:




Write the symbols for each element
Draw a Lewis dot structure for the valence shell of each element
Rearrange the electrons to pair up electrons from each atom
Draw the bond structure using chemical symbols and lines.
1. HC2H3O2
6. HNO2
2. C2H5OH
7. CH3CONH2
3. C3H8O
8. CH3CH2NH2
4. C3H6O
9. CH3COOCH3
5. CH3CN
10. CH3COH3
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https://www.coursehero.com/file/132113729/Worksheet-Chemical-Bonds-1doc/
D. Fill in the following table.
Elemen
t
Electron configuration
Noble Gas
Configuration
V. E
1. 53 I
2.
81
3.
38
4.
26
5.
56
Tl
Sr
Fe
Ba
E. Reflections
How is chemical bonding important in our daily lives?
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