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Tamil Nadu SSLC (Class 10) Unit 1C1: Periodic Trends in Atomic Properties — practice questions

Explore 15 free Unit 1C1: Periodic Trends in Atomic Properties questions in Tamil Nadu SSLC (Class 10) Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Unit 1C1: Periodic Trends in Atomic Properties questions and exercises with answers

Showing questions 1–15 of 15.

The modern periodic law states that the properties of elements are a periodic function of which property?Read the answer and worked solution →How many groups (vertical columns) are there in the modern periodic table?Read the answer and worked solution →Which family of elements occupies Group 1 of the modern periodic table?Read the answer and worked solution →Which scientist discovered the property atomic number that became the basis of the modern periodic law?Read the answer and worked solution →As one moves from left to right across a period, how does the atomic radius of the elements change?Read the answer and worked solution →The mineral from which a metal can be readily and economically extracted on a large scale is called a/an:Read the answer and worked solution →How does ionisation energy generally change on moving down a group in the periodic table?Read the answer and worked solution →Why is the size of a cation always smaller than its parent neutral atom?Read the answer and worked solution →The covalent radius of a hydrogen atom, given that the distance between the two nuclei in an H2 molecule is 0.74 angstrom, is:Read the answer and worked solution →Which separation method is most suitable for concentrating a light sulphide ore such as zinc blende (ZnS)?Read the answer and worked solution →A substance added to an ore to lower the fusion temperature and combine with the gangue is called a:Read the answer and worked solution →In the modern periodic table, the sixth period (atomic numbers 55 to 86) contains how many elements?Read the answer and worked solution →Which of these alloys is a non-ferrous copper alloy made of copper and zinc?Read the answer and worked solution →In the metallurgy of iron, the charge of roasted ore, coke and limestone is taken in which ratio in the blast furnace?Read the answer and worked solution →Using electronegativity values F = 4.0 and Na = 0.9 (approx 1.0), the Na-F bond is best described as:Read the answer and worked solution →

Worked practice questions

The modern periodic law states that the properties of elements are a periodic function of which property?

  1. Atomic mass
  2. Atomic number
  3. Atomic radius
  4. Atomic volume
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Correct answer: B. Atomic number

1. Mendeleev's table, based on atomic mass, had anomalies such as argon before potassium. 2. Moseley showed atomic number is the fundamental property. 3. The modern periodic law states properties are a periodic function of atomic number. _Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 8 Periodic Classification of Elements "Modern Periodic Law", p.114_

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How many groups (vertical columns) are there in the modern periodic table?

  1. 7
  2. 8
  3. 16
  4. 18
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Correct answer: D. 18

1. The vertical columns of the periodic table are called groups. 2. The modern periodic table arranges all elements into these columns. 3. There are 18 groups in total. The value 7 is the number of periods, not groups. _Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 8 Periodic Classification of Elements "Features of Groups", p.116_

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Which family of elements occupies Group 1 of the modern periodic table?

  1. Alkali metals
  2. Alkaline earth metals
  3. Halogens
  4. Noble gases
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Correct answer: A. Alkali metals

1. Group 1 elements have a single valence electron (1s configuration ending in one electron). 2. They are highly reactive metals such as lithium and sodium. 3. This family is called the alkali metals. _Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 8 Periodic Classification of Elements "Features of Groups", p.116_

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