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Question
How many groups and periods does the modern periodic table have?
Solution
The modern periodic table consists of seven horizontal rows and eighteen vertical columns.
RELATED QUESTIONS
Write the merits of the modern periodic table over Mendeleev’s Periodic table
Fill in the following blank with suitable word:
Group 17 elements are known as ...............
Which of the following statement is correct in regard to the classification of elements?
(a) Elements in modern periodic table are arranged on the basis of increasing atomic masses.
(b) Elements in Mendeleev's periodic table are arranged on the basis of increasing atomic numbers.
(c) In modern periodic table, the element nickel of lower atomic mass is kept before the element cobalt of higher atomic mass.
(d) In modern periodic table, the isotopes of chlorine having different atomic masses are kept in the same group.
Consider the following elements:
20Ca, 8O, 18Ar, 16S, 4Be, 2He
Which of the above elements would you expect to be:
(i) very stable?
(ii) in group 2 of the periodic table?
(iii) in group 16 of the periodic table?
Name the type of elements which have outermost shell incomplete.
Give the symbol and valency of the following element and radical.
Zinc
Fill in the blank:
The element lithium in the Modern Periodic Table with valency 1+ belongs to the group ______.
To the left of the zig-zag line in the periodic table are the metal elements.
______ and ______ are called inner transition elements.
Select the appropriate options and complete the following paragraph:
(metals, non-metals, metalloids, four, seven, s-block, p-block, d-block, f-block).
On the basis of electronic configuration, elements in the modern periodic table are classified Into ______ blocks. Groups 1 and 2 elements are included in ______ and all these elements are metals. (except Hydrogen). Group 13 to 18 elements are included in ______. This block contains metals, non-metals and metalloids. Group 3 to 12 elements are included in ______ and all the elements are ______ elements shown at the bottom of the periodic table i.e. Lanthanides and Actinides constitute ______ and all these elements are metals.
