Chapter 6: Substances (Barsam)

Front

Define 'molecule'.

Back

A molecule is a group of atoms bonded together.

Front

Draw a water molecule.

Back

Water (H2O) structures.

Front

Draw a carbon dioxide molecule.

Back

Carbon Dioxide (CO2) structures.

Front

Define 'crystal'.

Back

A crystal is a solid material whose atoms are arranged in a highly ordered structure.

Front

Explain how molecules and crystals are different from each other.

Back

Molecules and crystals are the two basic forms matter takes. In molecules, atoms cluster together in small groups. In crystal lattices, the atoms arrange
themselves geometrically into a repeating array or grid.

Front

Draw the 'family tree' of substances found in Figure 6.3.

Back

Family tree of substances with space for examples.

Front

How is the identity of an element determined?

Back

The identity of an element is determined by the number of protons in its nucleus.

Front

Draw the info box for the element Chlorine.

Back

Chlorine has an atomic number of 17 and an atomic mass of approximately 35.5.

Front

Explain what an element's atomic mass is.

Back

Atomic Mass is the mass of the nucleus. It is the number of protons added to the number of neutrons.

Front

Explain what an atomic number is.

Back

An atomic number is the number of protons that an element has in its nucleus.