Compounds and Ions in Chemistry

Study Notes

Compounds and Ions

Compounds made of metals and nonmetals contain charged entities called ions.
Ions can be single atoms or groups of atoms with a net charge.
Ions exist as either negatively charged or positively charged entities.
Negatively charged ions are termed 'anions.'
Positively charged ions are referred to as 'cations.'

Example: Sodium Chloride (NaCl)

Sodium chloride is composed of sodium ions and chloride ions.
Sodium ions are positively charged (Na+).
Chloride ions are negatively charged (Cl-).
The interaction of these ions results in the formation of the neutral compound NaCl.

Building Blocks of Matter

Atoms serve as the fundamental building blocks of all matter, similar to how a mason uses bricks to construct walls.
Comparative examples include the small grains of sand that form an ant-hill, emphasizing that even seemingly insignificant units contribute to larger structures.

Size of Atoms

Atoms are exceedingly small, eluding comparison with larger objects; countless atoms stacked together would only equal the thickness of a standard sheet of paper.
The measurement of atomic radius is conducted in nanometres, providing a precise scale for these tiny particles.

Conversion of Units

1/10°m equals 1 nanometre (nm), illustrating how minute atomic dimensions are.
1 metre (m) is equivalent to 10° nanometres, reinforcing the vast difference in scale between everyday measurements and atomic size.

Description

Explore the basics of ionic compounds and their charged species in this quiz. You'll learn about anions, cations, and their roles in compounds such as sodium chloride. Test your knowledge of how metals and nonmetals interact at the ionic level.