5.2 The Modern Periodic Table Slides

Multiple Choice

Which of the following best describes what the atomic number of an element represents?

• The number of protons in the nucleus

• The number of neutrons in the nucleus

• The number of electrons in the outer shell

• The total number of particles in the atom

Open Ended

Why is the atomic number considered the basis for the modern periodic table?

Multiple Choice

Which of the following best describes a period in the periodic table?

• A horizontal row of elements

• A vertical column of elements

• A group of elements with similar properties

• A set of elements with the same atomic mass

Multiple Choice

Which of the following statements about groups in the periodic table is correct?

• Each group is a vertical column and members have similar chemical properties.

• Each group is a horizontal row and members have different chemical properties.

• Group number equals the number of protons in the atom.

• Group number equals the atomic mass of the atom.

Multiple Select

Select all correct statements about the relationship between group number and electrons in the outermost energy level.

• Group number equals the number of electrons in the outermost energy level.

• All elements in a group have the same number of outermost electrons.

• Group number equals the number of protons in the atom.

• Elements in the same group have similar chemical properties.

Multiple Choice

Which isotope of chlorine contributes more to the average atomic mass of chlorine?

• Chlorine-35

• Chlorine-37

• Both contribute equally

• Neither contributes

Multiple Select

Which of the following are properties of metals?

• Good conductors of electric current and heat

• Solids at room temperature (except mercury)

• Malleable

• Brittle

Open Ended

Describe how the reactivity of nonmetals changes across Group 17 and Group 18 of the periodic table.

Multiple Choice

Which of the following statements best describes the general properties of nonmetals as compared to metals?

• Nonmetals are good conductors of heat and electricity.

• Nonmetals have properties opposite to those of metals.

• Nonmetals are always solid at room temperature.

• Nonmetals are malleable and ductile.

Multiple Choice

Based on the periodic table, where are metalloids generally located?

• On the far left side

• On the far right side

• Between metals and nonmetals

• Scattered randomly

Multiple Choice

Which of the following elements are classified as metalloids?

• Silicon, Germanium, Antimony, Tellurium

• Oxygen, Sulfur, Bromine, Carbon

• Sodium, Potassium, Calcium, Magnesium

• Fluorine, Chlorine, Iodine, Bromine

Multiple Choice

What is the modern periodic table based on?

• Atomic number

• Atomic mass

• Element symbol

• Number of neutrons