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Chemistry
UTME / JAMB 2022
Periodic Table & Periodicity
Solution
Electrons enter into orbitals in order of increasing energy as exemplified by?
A
1S\(^2\)2S\(^2\)2PX\(^2\)2py\(^2\)2pz\(^0\)3s\(^0\)
B
1S\(^2\)2S\(^2\)2PX\(^2\)2py\(^1\)2pz\(^1\)3s\(^0\)
C
1S\(^2\)2S\(^2\)2PX\(^1\)2py\(^1\)2pz\(^1\)3s\(^1\)
D
1S\(^2\)2S\(^2\)2PX\(^2\)2py\(^2\)2pz\(^0\)3s\(^1\)
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2021
Periodic Table & Periodicity
Solution
The most abundant rare gas in the atmosphere is?
A
He
B
Ne
C
Ar
D
Xe
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2021
Periodic Table & Periodicity
Solution
An element having the atomic number 17 will resemble which of the following elements having atomic number as given below?
A
33
B
35
C
18
D
19
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2021
Periodic Table & Periodicity
Solution
The molar enthalpy change accompanying the removal of an electron from a gas phase atom or ion in its ground state is called?
A
Electron gain enthalpy
B
Ionization enthalpy
C
Enthalpy change
D
Enthalpic gas removal
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2021
Periodic Table & Periodicity
Solution
The fourteen elements (atomic number 90-103) after actinium are called?
A
Actinoids
B
Nucleotides
C
Pre-actinum elements
D
Atomic elements
medium Difficulty
Study Explanation
Chemistry
WAEC / WASSCE 2020
Periodic Table & Periodicity
Solution
Group VIl elements in their combined states are called?
A
Halogens
B
Anions
C
Halide
D
Cations
medium Difficulty
Study Explanation
Chemistry
WAEC / WASSCE 2019
Periodic Table & Periodicity
Solution
which of the following elements has the highest ionization energy?
A
Calcium
B
Chlorine
C
Flourine
D
Magnesium
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2014
Periodic Table & Periodicity
Solution
Beryllium and aluminum have similar properties because they?
A
are both metals
B
belong to the same group
C
belong to the same period
D
are positioned diagonally to each other
medium Difficulty
Study Explanation
Chemistry
WAEC / WASSCE 2014
Periodic Table & Periodicity
Solution
Which of the following transition metals is not attracted to external magnetic field?
A
Cu
B
Fe
C
Ti
D
Zn
medium Difficulty
Study Explanation
Chemistry
WAEC / WASSCE 2011
Periodic Table & Periodicity
Solution
Which of the following ions has the electron configuration 2,8,8?
A
Na+
B
Mg2+
C
F-
D
CI-
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2010
Periodic Table & Periodicity
Moving from left to right across a period, the general rise in the first ionization energy can be attributed to the?
A
decrease in nuclear charge
B
increase in nuclear charge
C
decrease in screening effect
D
increase in screening effect
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2010
Periodic Table & Periodicity
Solution
The stability of the noble gases is due to the fact that they?
A
have no electron in their outermost shells
B
have duplet or octet electron configurations
C
belong to group zero of the periodic table
D
are volatile in nature
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2010
Periodic Table & Periodicity
Solution
Elements in the same period in the periodic table have the same?
A
number of shells
B
atomic number
C
chemical properties
D
physical properties
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2010
Periodic Table & Periodicity
Solution
A noble gas with a high power of fog penetration used in aerodrome beacons is?
A
krypton
B
argon
C
helium
D
neon
medium Difficulty
Study Explanation
Chemistry
UTME / JAMB 2007
Periodic Table & Periodicity
Solution
The elements that belong to the third period of the periodic table are?
A
Li, Be, Al and P
B
Na, P, O and Cl
C
B, C, N and O
D
Na, Mg, S and Ar
medium Difficulty
Study Explanation