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Chemistry
NECO SSCE 2003
Periodic Table & Periodicity
Solution
An atom of element X has an electronic configuration of \( 1s^22S^22p^63s^23p^3. \) In which group of the periodic table is X?
A
\( \text{0} \)
B
2
C
3
D
4
E
5
medium Difficulty
Study Explanation
Chemistry
NECO SSCE 2001
Periodic Table & Periodicity
Solution
The position of an element in the Periodic Table is determined by?
A
its atomic radius.
B
its density.
C
its relative atomic mass.
D
the number of protons in its atom.
E
the number of neutrons in its atoms
medium Difficulty
Study Explanation
Chemistry
WAEC / WASSCE 2000
Periodic Table & Periodicity
Solution
What are the values of x and y in the following equation? \(^{234}_{90}\)Th → \(^y_x\)Pa + ß- particle
A
91
234
B
92 235
C
89
235
D
88
238
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 1999
Periodic Table & Periodicity
Solution
Chlorine, bromine and iodine resemble one another in that they?
A
dissolve in alkalis
B
react violently with hydrogen without heating
C
are liquids
D
displace one another from solutions of their salts
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 1995
Periodic Table & Periodicity
Solution
A particle that contains 8 proton, 9 neutrons and 7 electrons could be written as?
A
O
B
O+
C
N
D
O-
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 1994
Periodic Table & Periodicity
Solution
Which of the following is the correct order of decreasing activity of the metals Fe, Ca, Al and Na?
A
Fe> Ca> Al> Na
B
Na> Ca> Al> Fe
C
Al> Fe> Na> Ca
D
Ca> Na> Fe>, Al
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 1987
Periodic Table & Periodicity
Solution
The greater the different in electronegativity between bonded atoms, the?
A
lower the polarity of the bond
B
higher the polarity of the bond
C
weaker the bond
D
higher the possibility of the substance formed being a molecule
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 1985
Periodic Table & Periodicity
Solution
A correct electrochemical series can be obtained from K, Na, Ca, Al, Mg, Zn, Fe, Pb, H, Cu, Hg, Ag, Au by interchanging?
A
Al and Mg
B
Zn and Fe
C
Zn and Pb
D
Pb and H
E
Au and Hg
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 1981
Periodic Table & Periodicity
Solution
An element X has 127 neutrons and 82 electrons.
Its atomic number is?
A
209
B
105
C
45
D
82
medium Difficulty
Study Explanation