The Modern periodic table is important because it is organized to provide a great deal of information about elements and how they relate to one another in one easy-to-use reference. The table can be used to predict the properties of elements, even those that have not yet been discovered. It is called the periodic table because of the way the elements are arranged. The horizontal rows (which go from left to right) are called 'periods' and the vertical columns (going from up to down) are called 'groups'. Refer to the table and answer
1. Name the elements present in group-17 of the Modern Periodic Table.
a. F
b. Cl
c. Br
d. All the options
2. How many elements are present in period 1 in the table above?
a. 2
b. 3
c. 4
d. 5
3. Which is the element whose atomic weight were corrected in the Modern periodic table on the basis of their position in Mendeleev's periodic table?
a. Gold
b. Platinum
c. Both option 1 and 2
d. Hydrogen
4. Who proposed the Modern Periodic Law?
a. Henry Moseley
b. John New land
c. Mendeleev
d. Johann Wolfgang Dobereiner
5. What is meant by a group in the periodic table?
a. horizontal rows
b. vertical columns
