Gr 9 NATURAL SCIENCES: CH 2.1 The Periodic Table
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Questions and Answers

Who is credited with proposing the original version of the Periodic Table?

  • Albert Einstein
  • Isaac Newton
  • Marie Curie
  • Dmitri Mendeleev (correct)

    • What is the arrangement of elements in the Periodic Table based on?

  • Increasing melting point
  • Increasing atomic number (correct)
  • Increasing atomic mass
  • Decreasing atomic radius

    • Where are non-metals typically found on the Periodic Table?

  • Center of the table
  • Left-hand side
  • Top-left corner
  • Right-hand side (correct)

    • What is usually included on each tile of the Periodic Table?

    <p>Element symbol, atomic number, and atomic mass</p> Signup and view all the answers

    What are the characteristics of metals?

    <p>Shiny, ductile, malleable, and high melting points</p> Signup and view all the answers

    What is unique to each element on the Periodic Table?

    <p>Atomic symbol and atomic number</p> Signup and view all the answers

    What is the position of hydrogen on the Periodic Table?

    <p>Top-left corner</p> Signup and view all the answers

    What is the number of vertical columns in the periodic table?

    <p>18</p> Signup and view all the answers

    What is the rule for capitalizing letters in chemical symbols?

    <p>The first letter is always capitalized</p> Signup and view all the answers

    What is the typical appearance of alkali metals?

    <p>Dull-gray</p> Signup and view all the answers

    What is a common product of the reaction between alkali metals and water?

    <p>Hydrogen gas</p> Signup and view all the answers

    Which alkali metal is the least reactive with water?

    <p>Lithium</p> Signup and view all the answers

    What is the product of the reaction between lithium and water?

    <p>Lithium hydroxide</p> Signup and view all the answers

    What is a characteristic of the reaction between sodium and water?

    <p>It produces a flame</p> Signup and view all the answers

    How does potassium react with water?

    <p>It reacts explosively and produces hydrogen gas</p> Signup and view all the answers

    What is the primary way elements are organized in the Periodic Table?

    <p>In order of increasing atomic number</p> Signup and view all the answers

    What distinguishes metals from non-metals in the Periodic Table?

    <p>Their position on the left or right side</p> Signup and view all the answers

    What is a characteristic shared by semi-metals?

    <p>They are all solids at room temperature</p> Signup and view all the answers

    What information is typically included on each tile of the Periodic Table?

    <p>Atomic number, atomic mass, and chemical symbol</p> Signup and view all the answers

    What is the primary purpose of the Periodic Table?

    <p>To organize elements in a systematic way</p> Signup and view all the answers

    What is a characteristic of non-metals?

    <p>They can be solids, liquids, or gases at room temperature</p> Signup and view all the answers

    What is unique to each element on the Periodic Table?

    <p>Its atomic number</p> Signup and view all the answers

    What is the reason why elements in the same group often share similar physical and chemical properties?

    <p>Due to similar electron configurations</p> Signup and view all the answers

    What is the general trend in reactivity of alkali metals with water?

    <p>The reactivity increases as you move down the group</p> Signup and view all the answers

    What is the product of the reaction between sodium and water?

    <p>Sodium hydroxide and hydrogen gas</p> Signup and view all the answers

    What is unique to each element's chemical symbol?

    <p>The symbol is usually the first one or two letters of the element's name</p> Signup and view all the answers

    How do alkali metals typically react with water?

    <p>They react vigorously and produce a gas</p> Signup and view all the answers

    What is the general appearance of alkali metals?

    <p>Dull-gray and soft</p> Signup and view all the answers

    What is a common characteristic of the reactions between potassium and water?

    <p>They produce a flame</p> Signup and view all the answers

    How do the electron configurations of elements in the same group relate to their physical and chemical properties?

    <p>They have a direct correlation</p> Signup and view all the answers

    What is the primary reason for the arrangement of elements in the Periodic Table?

    <p>To organize elements in a systematic way based on their atomic number</p> Signup and view all the answers

    What is the typical classification of an element based on its position on the Periodic Table?

    <p>As a metal, non-metal, or semi-metal</p> Signup and view all the answers

    What is the significance of the atomic number in the Periodic Table?

    <p>It is a unique identifier for each element</p> Signup and view all the answers

    What is the significance of the first letter in a chemical symbol?

    <p>It is always capitalized</p> Signup and view all the answers

    What is the reason why the reaction between potassium and water is more violent than the reaction between lithium and water?

    <p>The reactivity of alkali metals increases as you move down the group</p> Signup and view all the answers

    What is the characteristic of metals that is not typical of non-metals?

    <p>They are usually solids at room temperature with high melting and boiling points</p> Signup and view all the answers

    What is the relationship between the position of an element on the Periodic Table and its properties?

    <p>Elements with similar properties are found in the same group</p> Signup and view all the answers

    What is the common physical characteristic of alkali metals?

    <p>They are all soft and have a dull-gray appearance</p> Signup and view all the answers

    What is the product of the reaction between an alkali metal and water, besides hydrogen gas?

    <p>A hydroxide</p> Signup and view all the answers

    What is the significance of the regions on the Periodic Table?

    <p>They distinguish between metals, non-metals, and semi-metals</p> Signup and view all the answers

    What is the purpose of the chemical symbol on the Periodic Table?

    <p>To provide a unique abbreviation for each element</p> Signup and view all the answers

    Why do elements in the same group often share similar physical and chemical properties?

    <p>Because they have similar electron configurations</p> Signup and view all the answers

    What is the general trend in the reactivity of alkali metals with water?

    <p>It increases as you move down the group</p> Signup and view all the answers

    What is unique about the chemical symbol of sodium?

    <p>It is derived from its Latin name</p> Signup and view all the answers

    What is the characteristic of the reaction between an alkali metal and water that is common to all alkali metals?

    <p>It always produces hydrogen gas and a hydroxide</p> Signup and view all the answers

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