Port Said International Schools
Better Education for Future Generations
Science Department
Grade: 11
Unit 3 Revision
Name: ………………………………………. Date: ……………………………………………………
Write the scientific term for the following:
1. A bond which is formed as a result of the overlap of two atomic orbitals side by side.
Egypt 2005
………………………………………………………………………………………………
2. A group of elements whose valence shell has less than half its capacity of electrons.
Egypt 2005
………………………………………………………………………………………………
3. The bond in hydrogen molecule is pure covalent, while the bond in hydrogen
chloride is a polar covalent bond. Egypt 2005
………………………………………………………………………………………………
4. A bond produced from the electron cloud of valence electrons which decreases the
repulsive force between the positive metal ions in the crystal lattice. Egypt 2006
………………………………………………………………………………………………
5. With the exception of hydrogen, lithium and beryllium the atoms of all elements
tend to reach octet theory. Egypt 2006
………………………………………………………………………………………………..
6. The bond which is formed as a result of the overlap of two atomic orbitals on one
line (heat-to-head). Egypt 2009
………………………………………………………………………………………………
7. Covalent bond between sp – sp orbitals. Egypt 2010
……………………………………………………………………………………………….
Choose the correct answer:
1. When ammonium ion is formed, ammonia molecule is linked with the proton to
form (ionic – coordinate – covalent – metallic bond) bond. Egypt 2005
2. The oxidation number of hydrogen in sodium hydride is (+1 – (-1) - +2 – (-2)).
Egypt 2005
3. When sodium nitrate is heated (NO – NO2 – N2O – O2) gas evolved. Egypt 2006
4. The ionic bond is often formed between (different metals – metals and nonmetals –
nonmetals – metalloids). Egypt 2006
5. The bonds in ammonium hydroxide molecules are (polar covalent – ionic –
coordinate – all the previous). Egypt 2007
6. Ammonium chloride molecule NH4Cl contains (ionic – covalent – coordinate – all
the previous) bond(s). Egypt 2009
7. The strongest hydrogen bonds are those between the molecules of (HF – HBr – HCl
– HI). Egypt 2010
8. The type of hybridization in carbon atoms of the ethylene molecule is (sp – sp2 – sp3
– sp3d2). Egypt 2010
9. Sp hybridized orbitals are characterized by (three orbitals – linear in
shape – two orbitals – two orbitals and linear shape). Egypt 2011
http://pisscience.wikispaces.com/
Port Said International Schools
Better Education for Future Generations
Science Department
Grade: 11
Unit 3 Revision
Give reasons for the following:
1. The aluminum metal 13Al is harder than sodium 11Na. Egypt 2005
………………………………………………………………………………………………
……………………………………………………………………………………………..
2. The angle between two hybridized orbitals sp, sp in C2H4 molecule = 180°. Egypt
2006
…………………………………………………………………………………..
…………………………………………………………………………………..
3. The boiling point of water is relatively high. Egypt 2007
………………………………………………………………………………………………
……………………………………………………………………………………………..
4. Ammonium hydroxide has three types of bond. Egypt 2010
………………………………………………………………………………………………
……………………………………………………………………………………………….
What is the role of each of the following?
1. The number of valence electrons in the strength of metallic bond. Egypt 2005
..................................................................................................................................................
.................................................................................................................................................
What is meant by the following?
1. Coordinate bond. Egypt 2005
………………………………………………………………………………………………
………………………………………………………………………………………………
2. Amphoteric bond. Egypt 2005
………………………………………………………………………………………………
………………………………………………………………………………………………
3. Pure covalent bond. Egypt 2006
………………………………………………………………………………………………
………………………………………………………………………………………………
4. Hybridization. Egypt 2007
………………………………………………………………………………………………
………………………………………………………………………………………………
5. Metalloids. Egypt 2007
………………………………………………………………………………………………
………………………………………………………………………………………………
6. The electronic theory of valence. Egypt 2007
………………………………………………………………………………………………
………………………………………………………………………………………………
7. Hybridization sp2. Egypt 2008
………………………………………………………………………………………………
…………………………………………………………………………………
………………………………………………………………………………..
http://pisscience.wikispaces.com/
Port Said International Schools
Better Education for Future Generations
Science Department
Grade: 11
Unit 3 Revision
8. The molecular orbital theory. Egypt 2010
………………………………………………………………………………………………
………………………………………………………………………………………………
……..………………………………………………………………………………………
Compare between the following Egypt 2007 - Egypt 2009 - Egypt 2010
Pi bond
Sigma bond
Points of comparison
Type of hybridization
Metallic bond
Methane
Ethene
Hydrogen bond
 What are the inadequacies of the octet rule? Egypt 2007
………………………………………………………………………………………………
………………………………………………………………………………………………
………………………………………………………………………………………………
………………………………………………………………………………………………
………………………………………………………………………………………………
 Show by drawing only how the valence bond theory explains the bonding in
hydrogen fluoride molecule. Egypt 2008
………………………………………………………………………………………………
………………………………………………………………………………………………
………………………………………………………………………………………………
…………………………………………………………………………………..
…………………………………………………………………………………..
…………………………………………………………………………………..
…………………………………………………………………………………..
http://pisscience.wikispaces.com/
Port Said International Schools
Better Education for Future Generations
Science Department
Grade: 11
Unit 3 Revision
Choose from B and C which is suitable for column A: Egypt 2007
A
B
C
1.Valence bond theory.
a. its formed as a result of
A.It considered the molecule
the overlap of two atomic
as one unit
orbitals side by side
2.Sigma bond
b.it was based on the
B.the overlapped orbitals are
conclusions of quantum
on one line.
mechanics.
3.Ionic bond.
c.the atoms of all elements
C.it explains the formation
tend to reach the octet theory of the covalent bond.
structure except hydrogen,
lithium and beryllium
d.it is formed as a result of
D. its formed between
the overlap of atomic
chlorine and sodium in
orbitals along an axis
sodium chloride.
e. it is usually formed
E. it is formed from the
between metals and
electron cloud of the free
nonmetals.
valence electrons.
..................................................................................................................................................
..................................................................................................................................................
..................................................................................................................................................
.................................................................................................................................................
Correct the underlined words:
1. Metalloids are characterized by their nearly filled valence shells with electrons and
their electronegativity is greater than that of metals and nonmetals.
………………………………………………………………………………………………
……………………………………………………………………………………………….
http://pisscience.wikispaces.com/