Class 9 The Periodic Table Mock Test (ICSE)

Topics in The Periodic Table

• Dobereiner's triads and Newlands' octaves
• Mendeleev's periodic table
• Modern periodic law
• Groups and periods
• Variation of properties across a period and down a group

The Periodic Table practice questions with answers

1. Q1Multiple choice·1 mark
   What is the total number of periods and groups present in the modern periodic table?

   1. (a)7 periods and 16 groups
   2. (b)8 periods and 18 groups
   3. (c)8 periods and 16 groups
   4. (d)7 periods and 18 groups
   Show answer and step marks

   1. Correct option: (d) 7 periods and 18 groups+1

   Answer: (d)
2. Q2Multiple choice·1 mark
   The primary cause of periodicity in the properties of elements within the Modern Periodic Table is the:

   1. (a)repetition of similar valence shell electronic configuration
   2. (b)gradual increase in atomic mass
   3. (c)equal number of total electrons in a period
   4. (d)constant number of neutrons in each group
   Show answer and step marks

   1. Correct option: (a) repetition of similar valence shell electronic configuration+1

   Answer: (a)
3. Q3Multiple choice·1 mark
   Across a period from left to right in the modern periodic table, the electronegativity of elements generally:

   1. (a)decreases
   2. (b)first increases then decreases
   3. (c)increases
   4. (d)remains constant
   Show answer and step marks

   1. Correct option: (c) increases+1

   Answer: (c)
4. Q4Multiple choice·1 mark
   According to Newlands' Law of Octaves, the properties of every ________ element are similar to the first element.

   1. (a)seventh
   2. (b)tenth
   3. (c)ninth
   4. (d)eighth
   Show answer and step marks

   1. Correct option: (d) eighth+1

   Answer: (d)

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