Chem 5.1 Part 3 The Modern Periodic Table

What is the primary basis for the arrangement of elements in the modern periodic table?

• Atomic mass

• Atomic number

• Chemical properties

• Electron configuration

Which of the following elements is a liquid at room temperature?

• Mercury

• Carbon

• Bromine

• Phosphorus

Explain why tellurium is placed before iodine in the periodic table despite having a higher atomic mass.

• Because tellurium has more protons than iodine

• Because tellurium has a lower atomic number than iodine

• Because tellurium is a metal and iodine is a nonmetal

• Because tellurium and iodine have similar chemical properties

Identify the group of elements known for having a full outer electron shell.

• Alkali metals

• Halogens

• Noble gases

• Alkaline earth metals

Which of the following statements best describes metalloids?

• They are good conductors of heat and electricity.

• They have properties of both metals and nonmetals.

• They are all gases at room temperature.

• They are all liquids at room temperature.

Describe the trend in metallic character as you move across a period in the periodic table.

• It increases

• It decreases

• It remains constant

• It fluctuates

Which group of elements is known as the alkali metals?

• Group 1

• Group 2

• Group 17

• Group 18

What is the significance of the periodic law in the arrangement of the periodic table?

• It arranges elements by increasing atomic mass.

• It arranges elements by increasing atomic number.

• It shows the periodic repetition of physical and chemical properties.

• It classifies elements as metals, nonmetals, and metalloids.

Which of the following elements is classified as a nonmetal?

• Sodium

• Silicon

• Sulfur

• Iron

How does the IUPAC numbering system for groups differ from the U.S. system?

• IUPAC uses letters, while the U.S. system uses numbers.

• IUPAC uses numbers 1-18, while the U.S. system uses 1A-8A and 1B-8B.

• IUPAC uses colors, while the U.S. system uses symbols.

• IUPAC uses atomic mass, while the U.S. system uses atomic number.