Symbols formula and equation

CHEMISTRY SSS1 Second Term

WEEK 4

Symbols formula and equation

Performance Objectives

The student should be able to:

  1. Identify chemical symbols of elements and their valences
  2. Solve calculations on empirical and molecular formula
  3. State the law of conservation of matter

Content

chemical symbol of element and their valences

Valency

Valency is the combining power of an element. Elements in the same group of the periodic table have the same valency. The valency of an element is related to how many electrons are in the outer shell.

Group number

1

2

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