PERIODIC CLASSIFICATION

Number of elements in the first period of the periodic table are

• 1
• 2
• 6
• 18

Answer explanation

Who made use of the idea of relationship between atomic weights and atomic volume of the elements for their classification?

• Dobereiner
• Al-Razi
• Newlands
• Lother Meyer

Who attempted the classification of elements in order of their increasing weights

• Dobereiner
• Mendeleev’s
• Newlands
• All of these

Who said that physical and chemical properties of elements are periodic functions of their atomic weights

• Dobereiner
• Moseley's
• Newlands
• Mendeleev’s

Total number of s block elements are:

• 14
• 28
• 36
• 40

man made elements are consider to present after:

• Uranium
• Polonium
• Rubidium
• Francium

According to Mosely, what is the fundamental property

• Atomic weight
• Atomic number
• Volume
• Mass

Which orbital of valence shell is in the process of completion in case of outer transition elements

• p-orbital
• f-orbital
• d-orbital
• s-orbital

Answer explanation

for example in electron in 3d means

configuration 4s² 3d¹

means 4p orbitals are in the process of filling

The properties of the elements are directly related to

• Valency
• Ionization energy
• Electronegativity
• All of the above

The grouping of similar elements and the separation of dissimilar ones is called:

• Classification of elements
• An arrangement of elements
• Periodic functioning of elements
• A homologous series