Writing Chemical Equations

Magnesium can be burned in oxygen to produce solid magnesium oxide.

• Mg(s) + O₂(g)→ MgO(s)

• Mg(s) + O(g) → MgO(s)

• Mg(s) + CO₂(g) → MgO(s) + C(s)

• Mg(s) + O₂(g) → Mg₂O₂(s)

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which are the reactants in the following reaction?

• 2MgO

• 2Mg +O

• 2Mg + O₂

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NGSS.MS-PS1-1

NGSS.MS-PS1-5

In a chemical equation...

• a new substance is formed

• new atoms are formed

• old atoms disappear

• a equal sign is always used

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

The amount of atoms on each side of a chemical equation are

• different

• the same

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NGSS.MS-PS1-5

When balancing an equation...

• only the subscripts can be changed

• only the arrow can be changed

• only the symbols can be changed

• only the coefficients can be changed

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NGSS.MS-PS1-5

Is the following equation balanced?

• True

• False

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

How many Potassium (K) atom are there?

• 1

• 2

• 3

• 4

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NGSS.MS-PS1-1

Instead of using a chemical's long name, scientists use this instead when writing a chemical equation.

• Shorthand

• Braile

• Elemental symbols

• Elemental Code

The subscript tells you how many of what there are in a chemical reaction?

• atoms of that element

• molecules of that compound

• number of reactions

• They don't tell you anything.

A coefficient tells you what about the chemical reaction?

• Numbers of atoms in that element

• Numbers of molecules for that compound.

• How many reactions there are.

• They don't tell you anything.

Tags

NGSS.MS-PS1-5