Chemistry Quiz

What are the characteristics of a chemical determined by?

• The types of atoms and the type of bonding between them

• The geographical location of the chemical

• The age of the chemical

• The color of the chemical

Which of the following is NOT an example of a chemical mentioned in the text?

• Air

• Gunpowder in fireworks

• Boiling hot spray from a bombardier beetle

• Historical artifacts

Which one of these groups contains chemicals that are made up of only one type of atom?

• Elements

• Compounds

• Mixtures

• Solutions

Which one of these groups is the least likely to be found naturally in the Earth's crust?

• Elements

• Compounds

• Mixtures

• Solutions

What is the difference between a compound and a mixture?

• Compounds are made up of one type of atom, mixtures are not.

• Compounds are chemically combined, mixtures are physically combined.

• Compounds are found naturally, mixtures are man-made.

• Compounds are always solid, mixtures are always liquid.

How is a molecule different from an atom?

• A molecule is smaller than an atom.

• A molecule is made up of two or more atoms bonded together.

• A molecule is a single type of atom.

• A molecule is always a compound.

Which of the diagrams at right represent a molecule of a compound?

• A

• B

• C

• D

Identify the chemical element or elements that match the following description: "It is the only metal that exists as a liquid at normal room temperatures."

• Sodium

• Mercury

• Iron

• Calcium

Who first suggested that all substances consisted of tiny indestructible particles called atoms?

• John Dalton

• J. J. Thomson

• Democritus

• Niels Bohr

What did John Dalton's atomic theory propose in 1808?

• Atoms are indivisible and indestructible

• Atoms contain negatively charged particles

• Electrons orbit the nucleus at different energy levels

• The nucleus contains neutrons