molecule

What is the smallest unit into which a substance can be divided without a change in its chemical nature?

• Atom

• Element

• Molecule

• Compound

A molecule of water consists of __________.

• Two atoms of oxygen and one atom of hydrogen

• One atom of oxygen and two atoms of hydrogen

• Two atoms of hydrogen and one atom of oxygen

• One atom of hydrogen and one atom of oxygen

What is molecular structure?

• The way in which a compound is formed

• The way in which a molecule is organized, built or put together

• The way in which an element reacts with other elements

• The way in which a compound reacts with other compounds

Which type of microscope is used to take photographs of large molecules?

• Optical microscope

• Electron microscope

• Atomic microscope

• Chemical microscope

Which of the following gases are diatomic?

• Argon, helium, and neon

• Oxygen, hydrogen, and nitrogen

• Chlorine, helium, and nitrogen

• Argon, chlorine, and helium

Monatomic molecules are made up of at least two different atoms.

• true

• false

A molecule of a complex compound can contain several hundred atoms

• true

• false

The smallest part of a compound that can exist must contain at least two different atoms.

• true

• false

It is possible to see large molecules through the most powerful of optical microscopes.

• true

• false

Atoms of elements do not take part in chemical reactions.

• true

• false