Bonding Basics Review Name - Science Spot
Bonding Basics Review
Name _____________________________
1. Complete the chart using your knowledge of atoms.
Element
Atomic Symbol
Total # of Electrons
# of Valence Electrons
Bromine
Lithium
Calcium
Sulfur
Boron
Silicon
Phosphorus
# of Electrons Gained or Lost
Oxidation Number
2. Ionic Bonds - Draw the Lewis structures for each atom, draw arrows to show the transfer of electrons, write the charge for each ion, and then write the chemical formula.
(A) Potassium + Iodine
(B) Magnesium + Oxygen
(C) Lithium + Nitrogen
3. Covalent Bonds ? Draw the Lewis structures for each atom, draw circles to show the electrons that are shared, and then write the bond structure and chemical formula.
(A) Fluorine + Fluorine
(B) 3 Hydrogen + 1 Phosphorus
(C) 2 Hydrogen + 1 Sulfur
T. Trimpe 2008
Bonding Basics Review
ANSWER KEY
1. Complete the chart using your knowledge of atoms.
Element
Atomic Symbol
Total # of Electrons
# of Valence Electrons
Bromine
Br
35
7
Lithium
Li
3
1
Calcium
Ca
20
2
Sulfur
S
16
6
Boron
B
5
3
Silicon
Si
14
4
Phosphorus
P
15
5
# of Electrons Gained or Lost
Gain 1 Lose 1 Lose 2 Gain 2 Lose 3 Gain/Lose 4 Gain 3
Oxidation Number
11+ 2+ 23+ 4+ 43-
2. Ionic Bonds - Draw the Lewis structures for each atom, draw arrows to show the transfer of electrons, write the charge for each ion, and then write the chemical formula.
(A) Potassium + Bromine
(B) Magnesium + Oxygen
(C) Lithium + Nitrogen
K Br
Mg O
Li N
K1+ + Br1- KBr
Mg2+ + O2- MgO
Li Li Li1+ + Li1+ + Li1+ + N3-
Li3N
3. Covalent Bonds ? Draw the Lewis structures for each atom, draw circles to show the electrons that are shared, and then write the bond structure and chemical formula.
(A) Fluorine + Fluorine
(B) 3 Hydrogen + 1 Phosphorus
(C) 2 Hydrogen + 1 Sulfur
F F
F F
F2
H P H
H
HP H
H H
H3P
H S
H
H S
H2S
H H
T. Trimpe 2008
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