✓ Board-verified
Science · 2022 · 2 marks
CBSE 2022 · Region 4 · Set 2 · Q7
State Modern Periodic Law. How many rows and columns are there in the Modern Periodic Table ?
Marking-scheme solution
Properties of elements are a periodic function of their atomic number
'$\displaystyle 18$' vertical columns called groups
'$\displaystyle 7$' horizontal rows are known as periods
More from Periodic Classification of Elements
- In the following table, some elements have been arranged in a certain pattern: Identify the periodic law with…2022 · asked 3×
- Name the elements whose compounds formed the basis of classification in Mendeleev's periodic table. Why did…2022 · asked 3×
- State Newland Law of Octaves. 1+1+(1)/(2)+1 (1)/(2)=3 With an example, explain Dobereiner's Triads. List one…2022 · asked 2×
- In the modern periodic table, compare the tendency of the elements to lose electrons while moving (i) down a…2022
- An element 'M' has 25\% of the electrons filled in the third shell as in the second shell. The element ' M '…2025
- State the criteria used by Mendeleev for creating his Periodic Table. Compare the position of isotopes of…2022
- Give the criteria on the basis of which elements are placed (i) in a group and (ii) in a period in the modern…2022
- State Newland Law of Octaves. 1+1+(1)/(2)+(1)/(2)=3 With an example, explain Dobereiner's Triads. List one…2022
CBSE Class 10 Science past-paper question from the 2022board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.