Chemistry

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Past Questions

Question 1976
waec 1997
a

Group 0

b

Group 1

c

Group 4

d

Group 6

e

Group 7

Question 1977
waec 1997
a

90o

b

140o

c

109o

d

120o

e

180o

Question 1978
waec 1997
a

number of neutrons

b

number of electrons

c

electric charge

d

electronic structure

e

chemical properties

Question 1979
waec 1997
a

X3N

b

XN3

c

X3N2

d

N2X

e

NX2

Question 1980
waec 1997
a

mass

b

vapour density

c

volume

d

temperature

e

concentration

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