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2386
Arrange the following elements in order of increasing electron affinity: Br
2
CI
2
I
2
F
2
A.
I
2
CI
2
Br
2
F
2
B.
I
2
Br
2
CI
2
F
2
C.
CI
2
I
2
Br
2
F
2
D.
Br
2
CI
2
I
2
F
2
View Answer & Discuss
WAEC 2008
2387
Water molecules are held together by
A.
covalent bond
B.
hydrogen bond
C.
ionic forces
D.
van der Waals forces
View Answer & Discuss (1)
WAEC 2008
2388
The force of attraction between covalent molecules is?
A.
electrostatic attraction
B.
hydrogen bonding
C.
ionic force
D.
van der Waals forces
View Answer & Discuss (7)
WAEC 2008
2389
What is the mass of 6.02 x 10
24
atoms of magnesium? [Mg = 24, Avogadro constant = 6.02 x 10
23
atoms mol
-1
]
A.
240g
B.
24 g
C.
2.4g
D.
0.24g
View Answer & Discuss (4)
WAEC 2008
2390
Which of the following compounds with the corresponding masses contain the highest percentage of nitrogen? [N = 14]
A.
NH
3
= 17
B.
NH
4
CI = 53.5
C.
NH
4
NO
3
= 80
D.
(NH
3
)
2
SO
4
= 132
View Answer & Discuss (3)
WAEC 2008
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