NEW
Font size
Worksheetsperiodic classification of elements
Total questions: 10
Worksheet time: 5mins
The number of periods and groups in the
periodic table are______.
6,16
7,17
8,18
7,18
_____ group contains the member of
halogen family.
17th
15th
18th
16th
Chemical formula of rust is ________.
FeO.xH2O
FeO4.xH2O
Fe2O3.xH2O
FeO
If the distance between two Cl atoms in Cl2
molecule is 1.98Å, then the radius of Cl
atom is ________.
0.99 Å
0.09 Å
0.90 Å
0.98 Å
If the distance between two Cl atoms in Cl2
molecule is 1.98Å, then the radius of Cl
atom is ________.
0.99 Å
0.09 Å
0.90 Å
0.98 Å
Dobereiner tried to arrange the elements with similar properties into group. So, he called the groups “_______”
Octaves
Octaves
Triad
Metals
Non-Metals
Cl, I if these are the Dobereiner’s triad and the atomic masses of chlorine and the Iodine are 35,5 and 127 respectively. The atomic mass & the particular element is?
Ar, 40
F,19
Br, 81.25
At, 210
What happens to the electropositive character of elements on moving from left to right in a periodic table?
Increases
Decreases
First increases than decreases
First decreases than increases
What happens to the electropositive character of elements on moving from left to right in a periodic table?
Increases
Decreases
First increases than decreases
First decreases than increases
The electronic configuration of an element M is 2, 8, 4. In modern periodic table, the element M is placed in
4 group
2 group
14 group
18 group
