Counting Atoms Class Practice

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How many atoms of each element are in the following formula? Li₂SO₄?

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How many atoms of each element are in the following formula? 3BaCl₂?

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How many atoms of each element are in the following formula? 4AgNO₃?

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How many atoms of each element are in the following formula? Pb(OH)₂?

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How many atoms of each element are in the following formula? CH₃CO₂?

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Strontium phosphate, Sr₃(PO₄)₂, is a crystalline substance used in medicine and industry. How many phosphorus atoms are represented in the formula Sr₃(PO₄)₂?

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How many atoms of each element are in the following formula? Na(CO₃)₂?

Multiple Choice

The blue numbers in the image below represent ________

• I don't know, and don't want to try
• coefficients
• subscripts
• none of the answers are correct

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Iron = ___ atoms, Phosphorus = ___ atoms, Oxygen = ___ atoms

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Nitrogen= ___ atoms, Hydrogen = ___ atoms, Phosphorus= ___ atoms, Oxygen= ___ atoms

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Aluminum = ___ atoms, Sulfur = ___ atoms, Oxygen = ___ atoms,

Poll

How confident do you feel about this topic now?

• Very confident
• Somewhat confident
• Not confident