On many periodic tables, which color is commonly used to represent the element symbols of gases at room temperature?

• A. Red
• B. Green
• C. Blue
• D. Black

Answer: (A)

Verified step by step guidance

1. Understand that periodic tables often use color coding to represent different categories of elements, such as metals, nonmetals, and gases at room temperature.
2. Recall that gases at room temperature are typically represented by a specific color to distinguish them from solids and liquids.
3. Identify that the common convention on many periodic tables is to use the color red to represent gaseous elements at room temperature.
4. Recognize that other colors like green, blue, or black are usually assigned to other categories, such as metals or liquids, but not gases.
5. Conclude that the color red is the standard choice for indicating gases on many periodic tables.