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Course: High school chemistry > Unit 3

Lesson 1: Representing chemical reactions
Science
High school chemistry
Chemical reactions
Representing chemical reactions
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Problem

When sodium (a highly reactive metal) combines with chlorine (a toxic gas) the atoms rearrange to form table salt.
Crystals of sodium chloride
The chemical equation for this reaction is shown below.
2Na(s)+ClA2(g)→2NaCl(s)
Use the chemical equation to complete the statements.
Sodium (Na) has a
of 2.
Chlorine (ClA2) has a
of 2.
Sodium chloride (NaCl) has a
of 2.