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Groups of elements in the periodic table

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Waxaan aqoonsan karaa oo qeexi karaa astaamaha kooxaha kala duwan ee curiyeyaasha ee jaantuska xilliyeed.

Introduction

In this lesson: I can identify and describe properties of some different groups of elements in the periodic table. Each column of the periodic table is called a group, and each row is called a period. The periodic table was developed by a Russian scientist called Dimitri Mendeleev.

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Each column of the periodic table is called a group, and each row is called a period. The periodic table was developed by a Russian scientist called Dimitri Mendeleev. The periodic table contains all the elements organised into groups and periods, according to their properties. The elements in the same group in the periodic table have similar properties. In addition to groups, elements can be divided into non-metals and metals, which include the transition metals.

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Quizzes

  1. 1. What is the periodic table?

    • A list of all known compounds.
    • Correct answer:A chart that lists all known elements.
    • A tool for measuring atomic mass.
    • A guide to chemical reactions.
    • A chart of all known molecules.

  2. 2. What is an atom?

    • Correct answer:The smallest part of an element that can take part in a chemical reaction.
    • The smallest part of a compound.
    • A large molecule.
    • A type of cell.
    • A mixture of different elements.

  3. 3. Why is the periodic table organised in a specific way?

    • To alphabetise the elements.
    • Correct answer:To show the relationships and properties of the elements.
    • To group metals together.
    • To display elements in order of discovery.
    • To classify elements by colour.

  1. 1. Which of the following statements about the periodic table are correct?

    • Correct answer:The periodic table is organised by increasing atomic number.
    • Each row in the periodic table is called a group.
    • Elements in the same group have different properties.
    • Each column in the periodic table is called a period.
    • Correct answer:The periodic table was developed by Dimitri Mendeleev.

  2. 2. Which of the following statements about elements in the same group is correct?

    • They have the same number of electron shells.
    • Correct answer:They have similar chemical properties.
    • They have the same atomic number.
    • They are always metals.
    • They have the same number of protons.

  3. 3. Which of the following did Dimitri Mendeleev do when developing the periodic table?

    • Correct answer:He organised elements by increasing atomic weight.
    • Correct answer:He grouped elements with similar properties.
    • He discovered the electron.
    • Correct answer:He left gaps for undiscovered elements.
    • He created the modern periodic law.

  4. 4. Which statement of the following statements about the transition metals is correct?

    • They are found in Group 1 of the periodic table.
    • They have similar properties to non–metals.
    • Correct answer:They are located in the central block of the periodic table.
    • They have very low melting points.
    • They are all gases at room temperature.

What pupils see

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  • IntroductionPrepare
  • Starter quizActivate · 3 questions
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  • Exit quizCheck · 4 questions
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