Periodic Classification of Elements Sample Questions for Class 10
Question 1
What is shown above the element symbol on the periodic table?
A. atomic mass
B. element name
C. atomic number
D. number of isotopes
Question 2
Why does the periodic table of elements end with Uuo (Ununoctium)?
A. Elements heavier than Uuo are unstable and decay too rapidly to be properly categorized.
B. The periodic table of elements contains hand-picked elements by the Society of Chemistry Scholars.
C. There are no known cases of atoms which weigh more than Uuo.
D. Uuo is the last element that is completely stable.
Question 3
What are the horizontal rows of the periodic table called?
A. Groups
B. Lines
C. Periods
D. Periodic law
Question 4
Properties of elements repeat in a predictable way when atomic numbers are used to arrange elements into groups. This pattern of repeating properties is called the
A. Atomic Law.
B. Periodic Law.
C. Elemental Law.
D. Repeating Law.
Question 5
Elements that have similar chemical and chemical and physical properties end up in the same row on the Periodic Table.
A. True
B. False