01.
|
i |
Ii |
iii |
iv |
v |
|
C |
C |
A |
D |
D |
02.
i)
Melting point is the temperature at which a solid melts
to form a liquid.
ii)
Boiling point is a temperature at which a liquid boils
to form a vapour.
iii)
Density is the degree of compactness of a substance, which means it is
the mass per unit volume of a substance.
iv)
Electronegativity is the ability of an atom to attract
electron(s) towards itself.
v)
Ionization energy is the energy required to remove electrons
from an atom or ion.
vi)
Atomic radius is the distance between the nucleus of an
atom and the outermost shell.
03. (a)
i)
Group I elements are called alkali metals
because they react with water to form an alkaline solution.
ii)
Sodium
(Na) is stored under kerosene to prevent it from reacting with air since it is
more reactive.
(b) Physical properties
of members of first group elements (Li, Na and K)
§
They
are good conductors of heat and electricity
§
They
are soft metals
§
They
have low density
§
They
have shining surfaces when freshly cut
04. (a)
when group I metals react with oxygen, a metal oxide is formed
Example: 2Na (s) + O2 (g) à Na2O (s)
(b) Alkali metals react with water
to form alkaline solution and hydrogen gas.
Example: 2Na (s) + 2H2O (l)
à 2NaOH (aq) + H2 (g)
05.
i)
The
element in Group II, period 2 is Beryllium
(Be)
ii)
W = 2 :
2
I = 2: 4
C = 2: 6
K = 2: 8
L = 2: 8: 3
N = 2: 8: 5
F = 2: 8: 7
iii)
3919K
From:
A = P + n
Where:
A = atomic mass
P = Number
of proton/ number of electrons/ atomic number
n =
number of neutron
39 = 19 + n
n = 20
The number of protons = number of electrons = 19
The number of neutron is 20.
iv)
(a)
Alkali metal is B
(b) Alkali earth metals are W
and E
(c) Metalloid is I
(d) Noble gas is K
(e) Halogen is F
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07. Bonding, Formula and Nomenclature 01.For each of the following
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lett
03. HEAT SOURCES AND FLAMES
01. For each of the
following items, choose the most correct answer from the given alternatives and
write its
02. HYDROGEN
01. For each of the
following items, choose the most correct answer from the given alternatives and
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Answers: HEAT SOURCES AND FLAMES 01.
i
ii
iii
iv
v
B
C
A
A
FORM I EXAM 1 FORM ONE CHEMISTRY REVISION SERIES
SERIES 01
TIME: 2:00 HOURS
INSTRUCTIONS
· 
Answers: OXYGEN
01. Answers:
i
ii
iii
iv
v
A
B
