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2421
Which of the following alloys is mainly used in making statues?
A.
Brass
B.
Bronze
C.
Duralumin
D.
Steel
View Answer & Discuss
WAEC 2008
2422
Which of the following scientists discovered the neutron?
A.
Ernest Rutherford
B.
J.J Thompson
C.
James Chadwick
D.
R. A. M illikan
View Answer & Discuss (2)
WAEC 2009
2423
How many protons does
40
20
Ca contain?
A.
20
B.
30
C.
40
D.
60
View Answer & Discuss (3)
WAEC 2009
2424
If 100 atoms of element X contains 70 atoms of
9
X and 30 atoms of
11
X, calculate the relative atomic mass of X
A.
9.6
B.
10.6
C.
11.6
D.
20.0
View Answer & Discuss (3)
WAEC 2009
2425
Consider the reaction represented by the equation:
238
92
U +
1
0
→
139
56
Ba +
94
36
Kr + 3
1
0
n. The reaction represents a
A.
nuclear fission
B.
nuclear fusion
C.
radioactive decay
D.
spontaneous disintegration
View Answer & Discuss
WAEC 2009
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