SHORTHAND
The correct electron configuration of the S2- ion is
1s2 2s2 2p6 3s2 3p6
The maximum number of electrons that can occupy a principal energy level (n) of an atom is equal to
2n2
In an atom, the f sub level has electrons
14
What does the magnet quantum number describes about electrons of an atom?
This one describes the orientation of the orbitals
which element is represented in this electron configuration?
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d7
Rhodium
What is the electron configuration of a neutral atom in the ground state with a total of six valence electrons?
1s22s22p4
The energy level with a principal quantum number (n) of 4 contains a total of
4
Which quantity identify es an element?
a) atomic number
b) mass number
c) total number of neutrons in an atom of the element
d) total number of valence electrons in an atom of the element
b) mass number
c) total number of neutrons in an atom of the element
d) total number of valence electrons in an atom of the element
a) atomic number
The shape and the number of orbitals are determined by what quantum number?
Angular momentum quantum number oe Azimuthal quantum number
The abbreviated configuration of Iridium is written as
[Xe] 6s24f145d7
Which element has a total of 7 valence electrons present in the fifth energy level?
a) Sb b) Bi c) I. d) Br
C. I
Which electron configuration contains three half- filled orbitals?
a) 1s2 2s2 2p6
b) 1s2 2s2 2p5
c) 1s2 2s2 2p3
d) 1s2 2s2 2p
c) 1s2 2s2 2p3
The abbreviated electron configuration of Ga is
(Ar)4s23d104p1
The atom with 6 protons and 8 neutrons is
Carbon
Write the longhand electron configuration of Bismuth
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p3
Which principal quantum number is assigned to the valence electrons of a K atom in the ground state?
4
What is the maximum number of electrons that can be contained in the n = 5 principal energy level?
50
Hg is the symbol for---------- with valence electron of -------- having --------- energy level
Mercury with valence electrons of 2 having. the energy level of 6
What is wrong with this electron configuration?
1s2 2s2 2p6 3s2 3p6 4s2 4d10 4p6 5s1
There is no 3d 10 and 4d 10 is misplaced
Write the abbreviated electron configurations of the following elements:
iridium
Chlorine
Nobelium
Cesium
Magnesium
[Xe] 6s24f145d7
[Ne] 3s23p5
[Rn] 7s25f14
[Xe] 6s1
[Ne] 3s2
Which species does not have a noble gas electron configuration?
a) Na+ b) Mg2+ c) Kr d) At
d) At
In an atom, the d sub level has how many orbital
5
On which block on the periodic table can we find lanthanides?
F- block
What is wrong with this electron configuration?
[Rn] 7s2 5f9 6d2
no, 5f shell must be filled before the 6d shell
Write an unabbreviated electron configuration of I
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p5