Advertisements
Advertisements
प्रश्न
How many periods and groups are there in the modern periodic table?
Advertisements
उत्तर
Eighteen groups and seven periods
APPEARS IN
संबंधित प्रश्न
Fill in the following blank with suitable word:
Group 18 elements are called ...............
Give two example of group 1 elements.
On the basis of electronic configuration, how will you identify the first element of a period?
What is meant in the periodic table by a period?
Give the chemical formula of sodium sulphite
State the number of elements in Period 3 of the Periodic Table.
Complete the following flow chart.
Compare the radii of two species X and Y. Give reasons for your answer.
- X has 12 protons and 12 electrons
- Y has 12 protons and 10 electrons
Give the criteria on the basis of which elements are placed (i) in a group and (ii) in a period in the modern periodic table. The atomic number of an element is 16. According to the criteria, in which group and period it should be placed?
Define groups of modern periodic table.
