1.1 Chemistry: The Central Science
1.1 Chemistry: The Central Science
1.1 Chemistry: The Central Science
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1.3 Classification of Matter<br />
Water can be chemically changed by passing an<br />
electric current through it to produce<br />
hydrogen and oxygen.<br />
• <strong>The</strong> reactant (water) is written on the left.<br />
• <strong>The</strong> products (hydrogen and oxygen) are written<br />
on the right.<br />
• An arrow connects the two parts to indicate a<br />
chemical reaction. <strong>The</strong> conditions necessary are<br />
written above and below the arrow.