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MBD-ATOMS AND MOLECULES -Example
- What is obtained when the atoms of the same element combine ?
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- How many atoms are present in oxygen molecule.
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- Give four examples of diatomic molecules.
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- Give one example of tetra-atomic molecule.
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- Give one example of octa-atomic molecule.
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- What is produced when three atoms of oxygen combine.
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- Name isotopes of carbon
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- What is the ratio by mass of C and O in carbon dioxide ?
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- What is the ratio by number between the atoms of H and O in water ?
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- Define an ion.
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- What is a cation ?
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- What is an anion ?
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- What is the ratio by mass of Ca nd O in calcium oxide (CaO) ?
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- What is the ratio by mass of Mg and S in magnesium sulphate ?
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- What is the ratio by mass of Na and Cl in sodium chloride (NaCl) ?
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- Define chemical formula ?
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- Define valency
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- What are diatomic molecules ?
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- Define molecular mass of a subtance?
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- Which unit is used for expressing molecular masses ?
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