1.7 The periodic table

• The periodic table is a tabular arrangement of chemical elements organized by their atomic number and chemical properties
• Elements in the periodic table are arranged by their atomic number, increasing from left to right across periods
• Groups in the periodic table are arranged vertically.


  True
• What do elements in the same group have in common?

  Chemical properties
• Match the organization of the periodic table with its purpose:

  Classify elements based on properties ↔️ Elements are arranged by increasing atomic number

  Predict the behavior of elements ↔️ Grouped by similar chemical properties

  Identify relationships between elements ↔️ Periodic trends in properties
• Which group do Lithium (Li) and Sodium (Na) belong to?

  Group 1
• Match the feature with its description:

  Periods ↔️ Horizontal rows

  Groups ↔️ Vertical columns
• Groups are vertical columns numbered 1 to 18
• Atomic radius increases across periods from left to right.

  False
• Which element in Period 3 has a larger atomic radius: Sodium (Na) or Chlorine (Cl)?

  Sodium
• Match the category with its properties:

  Metals ↔️ Conduct heat and electricity well

  Non-Metals ↔️ Poor conductors, brittle

  Metalloids ↔️ Intermediate conductivity
• Transition metals often form colored compounds.


  True
• Which block contains elements with high melting points and good conductivity?

  d-block
• Match the period with its description:

  Period 1 ↔️ Contains H and He

  Period 2 ↔️ Includes Li to Ne

  Period 3 ↔️ Ranges from Na to Ar
• How many groups are there in the periodic table?

  18
• Key trends across periods and down groups include atomic radius and electronegativity
• Atomic radius increases as you move down a group due to the addition of electron shells.


  True
• Match the category with its properties:

  Metals ↔️ Conduct heat and electricity well

  Non-Metals ↔️ Poor conductors, brittle

  Metalloids ↔️ Intermediate properties
• Where are transition metals located in the periodic table?

  Groups 3-12
• The periodic table is divided into blocks based on the type of atomic orbital being filled by the highest energy electron.


  True
• What type of ions do alkali metals form?

  +1
• Noble gases are stable and non-reactive due to their filled electron shells.


  True
• Electronegativity increases across a period as elements become more nonmetallic
• How are elements arranged in the periodic table?

  Increasing atomic number
• Which elements are in Period 1 of the periodic table?

  H and He
• The periodic table classifies elements and arranges them in increasing order of atomic number
• Trends in atomic radius and electronegativity across periods and down groups

  1️⃣ Atomic radius decreases across periods

  2️⃣ Electronegativity increases across periods

  3️⃣ Atomic radius increases down groups

  4️⃣ Electronegativity decreases down groups
• Periods in the periodic table are horizontal rows with similar electron configurations
• Elements in the periodic table are organized by their atomic number
• Elements in Group 1 have 1 valence electron and are highly reactive.


  True
• In which group and period is Sodium (Na) located?

  Group 1, Period 3
• Electronegativity decreases down groups
• Fluorine (F) is more electronegative than Iodine (I).


  True
• Which groups in the periodic table contain transition metals?

  Groups 3-12
• The s-block is located in Groups 1 and 2.
• The periodic table is organized by atomic number and chemical properties.

  True
• The periodic table is organized into groups and periods
• Elements in Group 1 have 1 valence electron and exhibit similar highly reactive properties.


  True
• What happens to atomic radius as you move across a period from left to right?

  It decreases
• The periodic table categorizes elements into metals, non-metals, and metalloids