1.2.4 The Periodic Table

• Elements in the periodic table are arranged in increasing order of their atomic number
• Elements with similar chemical properties are grouped together in the periodic table.


  True
• Metals are good conductors of heat and electricity
• The atomic radius increases as you move across a period from left to right.

  False
• Arrange the following properties in the order they trend down a group in the periodic table:

  1️⃣ Atomic radius increases

  2️⃣ Electronegativity decreases

  3️⃣ Ionization energy decreases
• What is the periodic table organized by?

  Atomic number
• Elements are grouped based on their atomic structure and chemical properties
• The atomic number of an element corresponds to the number of protons in its nucleus.

  True
• What are the horizontal rows in the periodic table called?

  Periods
• Elements in the same period have increasing atomic number and atomic radius
• What are the three main types of elements in the periodic table?

  Metals, nonmetals, metalloids
• Match the property with the type of element:

  Shiny appearance ↔️ Metals

  Dull appearance ↔️ Nonmetals

  Semiconductor ↔️ Metalloids
• Ionization energy decreases as you move down a group
• How are elements organized in the periodic table?

  Increasing atomic number
• The periodic table can predict the chemical behavior of elements based on their position.


  True
• Match the feature with its corresponding group or period:

  Number of Columns ↔️ 18

  Number of Rows ↔️ 7

  Similar Chemical Properties ↔️ Groups

  Increasing Atomic Number ↔️ Periods
• Nonmetals have a shiny appearance and are good conductors of electricity.

  False
• What happens to electronegativity as you move down a group?

  Decreases
• What are periods in the periodic table?

  Horizontal rows
• What is one application of the periodic table in chemistry?

  Predicting element properties
• Arrange the following properties in the order they trend across a period from left to right in the periodic table:

  1️⃣ Atomic radius decreases

  2️⃣ Electronegativity increases

  3️⃣ Ionization energy increases
• What does the periodic table allow us to predict about elements?

  Chemical behavior
• Match the feature of the periodic table with its description:

  Organization ↔️ Elements arranged in increasing atomic number

  Atomic Structure ↔️ Grouping based on atomic structure and chemical properties
• What is the vertical column in the periodic table called?

  Group
• The periodic table is organized by atomic structure and increasing atomic number
• Match the group or period with an example from it:

  Group 1 ↔️ Alkali metals

  Group 18 ↔️ Noble gases

  Period 1 ↔️ Hydrogen

  Period 2 ↔️ Lithium
• Elements in the same group have similar valence electron configurations.


  True
• What happens to electronegativity as you move down a group in the periodic table?

  Decreases
• The periodic table is organized by the number of protons in the nucleus of an atom.


  True
• The atomic number of an element corresponds to the number of protons
• Elements with the same number of valence electrons are placed in the same period.

  False
• Metalloids are also referred to as semiconductors
• What are the trends in atomic radius as you move across a period?

  Decreases
• What are groups in the periodic table?

  Vertical columns
• Atomic size decreases from left to right across a period
• Elements in the same group have similar chemical properties due to the same number of protons.

  False
• Why are elements in the periodic table arranged in increasing order of their atomic number?

  To group similar properties
• What are the three main categories of elements in the periodic table?

  Metals, nonmetals, metalloids
• Match the property with the correct category of elements:

  Shiny Appearance ↔️ Metals

  Brittle and Dull ↔️ Nonmetals

  Semiconductor ↔️ Metalloids
• Understanding periodic trends allows us to predict the chemical behavior of elements.


  True