(S)Unit1, Less.3: Molecules & Extended Structures

A pure substance made up of two or more different types of atoms joined together by chemical bonds, is a _______

• extended structure
• compound
• element
• molecule
• chemical bond

What are the minimum number of atoms to comprise one Oxygen molecule? ______

• 1
• 2
• 3 or more

A constant mathematical relationship is called a __________

• fixed formula
• fixed ratio
• constant density
• fixed mass

Which of these substances is a compound? A. carbon (C) B. chlorine (Cl) C. uranium (U) D. ammonia (NH3)

Some molecules are all the same atoms, called a ________.

• mixture
• element
• compound

An attractive force that holds atoms together; it is the electrons, protons, and neutrons.

A substance in which the particles are arranged in an orderly, geometric, repeating pattern, is called a __________

Sucrose is composed of carbon, oxygen, and hydrogen. Which statement best describes the properties of sucrose?

• Sucrose is different from the properties of carbon, oxygen, and hydrogen.
• Sucrose is exactly like the properties of carbon (C).
• Sucrose is exactly like the properties of oxygen (O).
• Sucrose is exactly like the properties of hydrogen (H).

The repeating unit in a diamond is one of several 3D structures, such as one atom with three connected atoms spread out equally from the center atom. What does this repeating pattern give to a diamond?