WorksheetsClass 10 Chemistry chapter1
Total questions: 10
Worksheet time: 10mins
Electronic configuration of Aluminium (Al) is
2,8,1
2,8,2
2,8,3
2,8,4
Mendeleev's law states that the properties of an elements are the periodic functions of
Atomic numbers
Atomic masses
Elements which have since been discovered that were left blank by Mendeleev in his periodic table
Scandium
Barium
Gallium
Germanium
Atomic number of potassium is (a)
Mendeleev periodic table have
8 groups, 7 periods
8 groups, 6 periods
7 groups, 8 periods
6 groups, 8 periods
Modern periodic table have
18 groups
7 horizontal rows
18 vertical columns
7 periods
"The atomic mass of bromine is almost equal to the average atomic masses of chlorine and iodine". Which law satisfy this statement?
Mendeleev's law
Newland's law
Modern periodic law
Dobereiner' law
Classification of elements were compare to the musical notes by
Dobereiner
Newland
Mendeleev
Lavoisier
Elements of the groups 1, 2 and 11 to 18 are called normal or representative elements in Modern periodic table
True
False
Choose the correct statement
1st period is called very short period
6th period is called long period
There are 14 elements in lanthanide series
2nd and 3rd are called short periods
