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 (C)</p> Signup and view all the answers

What are the characteristics of metals?

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

What is unique to each element on the Periodic Table?

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

What is the position of hydrogen on the Periodic Table?

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

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

<p>18 (C)</p> Signup and view all the answers

What is the rule for capitalizing letters in chemical symbols?

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

What is the typical appearance of alkali metals?

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

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

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

Which alkali metal is the least reactive with water?

<p>Lithium (A)</p> Signup and view all the answers

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

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

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

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

How does potassium react with water?

<p>It reacts explosively and produces hydrogen gas (B)</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 (A)</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 (D)</p> Signup and view all the answers

What is a characteristic shared by semi-metals?

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

What is the primary purpose of the Periodic Table?

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

What is unique to each element on the Periodic Table?

<p>Its atomic number (D)</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 (A)</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 (C)</p> Signup and view all the answers

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

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

How do alkali metals typically react with water?

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

What is the general appearance of alkali metals?

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

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

<p>They produce a flame (A)</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 (A)</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 (D)</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 (B)</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 (B)</p> Signup and view all the answers

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

<p>It is always capitalized (D)</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 (C)</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 (A)</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 (A)</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 (A)</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 (C)</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 (C)</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 (A)</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 (D)</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 (A)</p> Signup and view all the answers

What is unique about the chemical symbol of sodium?

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

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