Worksheetsperiodic table of element
Total questions: 26
Worksheet time: 15mins
which colour of the periodic table correspond with halogen ?
red
yellow
blue
orange
Chlorine is a ?
non-metal
metal
metalloids
The maximum number of elements in the third period is
8
6
12
10
On moving from left to right in a period in the Periodic table, the size of atom
Increases
Decreases
Does not change appreciably
First decreases and then increases
Which of the following elements has the smallest atomic radius?
Sulfur [Z=16]
Chlorine[Z=17]
Aluminum[Z=13]
Sodium[Z=11]
consider the following ions : O2-, F- ,Na+ and Mg2+.Arrange the ion in order of decreasing ionic radii .
F-> Na+ > O2- > Mg2+
O2- > F-> Na+ > Mg2+
O2- < F- < Mg2+ < Na+
O2- <F- < Na+ < Mg2+
What is the electronic configuration of Aluminium (Al) ?
1s2 2s2 2p6 3s2 3p6 3d1 4s2
1s2 2s2 2p6 3s2 3p2
1s² 2s² 2p⁶ 3s² 3p¹
1s² 2s² 2p⁶ 3s²
Which of the following does not depend on the attraction of the bonding pair towards the nucleus ?
The amount of shielding by inner shell electrons .
The number of proton in the nucleus .
The repulsion by the electrons in the same valence shell.
The distance from the nucleus.
why the ionization of energy drop from magnesium to aluminium ?
The outer electron in aluminium is in a p sub-shell which is lower than outer electron of magnesium .So less energy needed to remove the electron .
the outer electron in aluminium is in a s sub-shell which is higher than outer electron of magnisium . So less energy needed to remove electron
The outer electron in aluminium is in a p sub-shell which is higher than outer electron of magnesium .So less energy needed to remove the electron .
The outer electron in aluminium is in a s sub-shell which is lower than outer electron of magnesium .So more energy needed to remove the electron .
Which is smaller... Mg or Mg2+ ?
Mg because it gains an energy level
Mg due to extra electron repulsion
Mg2+ because of extra electron repulsion
Mg2+ because it loses an energy level
Based on the successive ionisation energies below,how many valence electrons does the element M have?
IE1 = 943
IE2 = 1,950
IE3 = 3,852
IE4 = 5,492
IE5 = 23,085
IE6 = 26,791
IE7 = 30,024
2
3
4
5
The size of Na+ > Mg2+ > Al3+. Which of the followings explain(s) this trend?
Effective nuclear charge increases
The number of electrons is the same but the number of protons increases
The number of electrons and protons increases.
Which of the following statement describes a correct steps in the formation of an ionic bond between sodium and chlorine ?
Removing an electron from sodium (ionization energy) will provide energy for ionic bond formation
Adding the electron to chlorine (electron affinity) will require energy for ionic bond formation .
Overcoming the Pauli repulsion from the overlap of wavefunctions of core electrons will release energy.
The Coulombic potential between the ions (lattice energy) will release energy.
Which element has the highest electronegativity?
Why the electronegativity of Cl is the highest in Period 3?
Cl is the largest and has the greatest effective nuclear charge
Cl is the smallest and has the lowest effective nuclear charge
Cl is the largest and has the lowest effective nuclear charge
Cl is the smallest and has the greatest effective nuclear charge
The noble gas configuration is for which element?
I
At
Br
Cd
Xe
Chlorine is larger than Sodium because they have the same number of shells and Chlorine has more protons, neutrons, and electrons.
True
False
What is the oxidation number of Magnesium (Mg)?
+2
-2
+4
-4
