The Periodic Table

All periods on the periodic table contain the same number of elements.

• True
• False

Group 14 on the periodic table contains metals, nonmetals, and metalloids.

• True
• False

A single horizontal portion of the periodic table, as shown below, is called _____.

• a class
• a group
• a method
• a period

Helium and most nonmetals are found in which area of the periodic table?

• On the left-most side.
• On the right side.
• In the middle column of the periodic table.
• In the bottom rows.

In the modern periodic table, elements are arranged according to increasing ____.

• atomic number
• atomic mass
• date of discovery
• electrical conductivity

Which of the following categories of elements represents almost three-fourths of the periodic table?

• gases
• metalloids
• metals
• nonmetals

Which elements have properties of both metals and nonmetals?

• gases
• metalloids
• metals
• nonmetals

What is the atomic number for Potassium?

• 19
• 39.098
• 20
• 58

What is the atomic mass for Potassium?

• 19
• 39.098
• 20
• 58

In the mid-1800s, Russian chemist and teacher _______________ created a table to help classify the elements by their properties.

• Alexander Fleming
• Marie Curie
• Dimitri Mendeleev
• Isaac Newton