Download App

Periodic Classification of Elements — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10SciencePeriodic Classification of Elements3 Marks
Question
State any three limitations of Mendeleev’s classification of elements.
✓

Answer

Limitations of Mendeleevs classification of elements:
  1. The position of isotopes could not be explained.
  2. Wrong order of atomic masses of some elements could not be explained.
  3. A correct position could not be assigned to Hydrogen in the periodic table.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[3 Mark Questions]" from Periodic Classification of Elements→Periodic Classification of Elements — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

Bacteria have a simpler body plan when compared with human beings. Does it mean that human beings are more evolved than bacteria? Provide a suitable explanation.
→
"Two areas of study namely 'evolution' and 'classification' are interlinked". Justify this statement.
→
What is meant by biological magnification? With the help of a food chain, explain how biological magnification of harmful chemicals can occur.
→
Draw a neat diagram of a flower showing its various parts. In this diagram mark stem, receptacle, sepals, petals, stamen and carpel.
→
$a.$ Calculate the resistance of a metal wire of length $2 m$ and area of cross$-$section $1.55 \times 10^{-6} m^2$ $($Resistivity of the metal is $\left.2.8 \times 10^{-8} \Omega m\right)$
$b.$ Why are alloys preferred over pure metals to make the heating elements of electrical heating devices?
→
Calculate the focal length of a convex lens which produces a virtual image at a distance of 50cm of an object placed 20cm in front of it.
→
 An aldehyde as well as a ketone can be represented by the same molecular formula, say $C _3 H _6 O$. Write their structure and name them. State the relation between the two in the language of science.
→
What evidence do we have for the origin of life from inanimate matter (lifeless matter)?
→
Under what conditions permanent electromagnet is obtained if a current carrying solenoid is used? Support your answer with the help of a labelled circuit diagram.
→
How do Mendel’s experiments show that traits may be dominant or recessive?
→