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WorksheetsElectron Configuration Quiz
Total questions: 28
Worksheet time: 14mins
An element with the electron configuration of 1s 2s 2p would have a combining power of
0
2
6
8
The electron configuration of carbon atom in its excited state is [C]
1s 2s 2px 2py¹
1s 2s 2px 2py
1s 2s 2px 2py¹2pz¹
1s 2s¹ 2px 2px 2pz
Which of the following noble gases has electronic structure similar to that of N in NN₁? [¹N]
He
Ne
Ar
Kr
The number of orbitals in a p-sub level of an atom is
2
3
5
6
Which of the following ions has an electron configuration different from the others?
Cr
O
12Mg''
1A
The electron configuration of Fe is
[Ar] 4s 3d''
[Ar] 4s 3d
[Ar]4s¹3d
[Ar]4s 3ds
Which of the following arrangements represents the correct order of electronic energy level?
1s 2p 2s 3p 3s 3d 4s
1s 2s 2p 3s 3p 3d 4s
1s 2s 2p 3s 3p 4s 3d
1s 2s 3s 2p 3p 4s 3d
How many electrons are in the ion F [F]
8
9
10
19
The valence electrons of Mg are in the
3s orbital
2p orbital
2s orbital
1s orbital
Which of the following electron configurations represents the transition element chromium (Cr)?
1s 2s 2p 3s 3p 4s 3d
1s 2s 2p 3s 3p* 3d''
1s 2s 2p 3s 3d 4s¹
1s 2s 2p 3s 3p 4s¹ 3d²
How many orbitals are in the d-sub shell?
1
3
5
7
Which of the following is the configuration of sodium ion (Na'') if the atom is represented as Na?
1s 2s 2p
1s 2s 2p 3s
1s 2s 2p 3s¹
1s 2s 2p 3d²
From the symbols below: Which of the following ions has/have the configuration 2, S? F, 11Na, Mg and 20Ca
IV Only
I & II
III & IV
I, II & III
Which of the following electronic configurations represent that of a noble gas?
2, 8, 8, 2
2, 8, 2
2, 8
2, 6
If an atom of an element X is represented as 'X', which of the following deductions is/are correct?
IV
I and II
III and IV
I, II, and III
Which of the following electronic structures belongs to a noble gas?
18/2s
1s 2s 2p 3s 3p
1s 2s 2p 3s 3p
1s 2s 2p
Which of the following elements has a ground state electronic configuration with an incomplete penultimate shell?
Iron
Sodium
Aluminium
Calcium
An element Y has the electronic configuration 1s 2s 2p 3s 3p. To what period does it belong in the periodic table?
3
4
5
6
An element whose atomic number is 19 has the electronic configuration
1s 2s 2p 3s 3p
1s 2s 2p 3s 3p 3d¹
1s 2s 3p*3d¹
1s 2s 2p 3s 3p 4s
The maximum number of electrons that can be accommodated in the shell having the principal quantum number 3 is
3
8
9
10
18
The electronic configuration of an element is 1s 2s 2p 3s 3p', Where is the element located in the periodic table?
Group Ill, period 3
Group lil, period 5
Group V, period 3
Group V, period 5
The electrons that are most easily removed from Mg are in which orbital?
1s
2s
2p
3s
How many unpaired electrons are there in an atom of an element with the following electronic configuration? 1s 2s 2p
0
1
2
6
An element X with electronic configuration 1s 2s 2p 3s combines with another element Y with the configuration 1s 2s 2p 3s 3p. What is the formula of the compound formed?
X.Ys
X₂Y3
XYS
XY₂
The following are s-block elements except
lithium
magnesium
potassium
aluminium
Which of the following statements is not correct? The 4s orbital
is defined by the quantum number l= 0
is of higher energy than the 3d orbital
contains a maximum of two electrons
is spherical about the nucleus
Which of the following ions has the same electronic structure as 40 18Ar?
Nitride
Oxide
Bromide
Phosphide
Which of the following is correct about the electrons in the 1s orbital? They
have the same spin
are easier to remove than those in the 2p orbital
are closest to the nucleus
have the same energy as those in the 2s orbital
